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121031331330 = 235721319333337
BaseRepresentation
bin111000010111000000…
…1111000111000000010
3102120101212210200010010
41300232001320320002
53440333010100310
6131333453245350
711513161225200
oct1605601707002
9376355720103
10121031331330
1147369038668
121b559193856
13b54aa744b0
145c022cc070
1532357c5320
hex1c2e078e02

121031331330 has 192 divisors, whose sum is σ = 383045362560. Its totient is φ = 24192193536.

The previous prime is 121031331329. The next prime is 121031331353. The reversal of 121031331330 is 33133130121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 121031331297 and 121031331306.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 196422 + ... + 529758.

It is an arithmetic number, because the mean of its divisors is an integer number (1995027930).

Almost surely, 2121031331330 is an apocalyptic number.

121031331330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121031331330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191522681280).

121031331330 is an abundant number, since it is smaller than the sum of its proper divisors (262014031230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121031331330 is a wasteful number, since it uses less digits than its factorization.

121031331330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333393 (or 333386 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 121031331330 its reverse (33133130121), we get a palindrome (154164461451).

The spelling of 121031331330 in words is "one hundred twenty-one billion, thirty-one million, three hundred thirty-one thousand, three hundred thirty".