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121201500 = 22353721797
BaseRepresentation
bin1110011100101…
…10001101011100
322110001200012110
413032112031130
5222011422000
620005434020
73001124100
oct716261534
9273050173
10121201500
1162462532
123470b910
131c157a84
141214d900
15a991850
hex739635c

121201500 has 288 divisors, whose sum is σ = 439193664. Its totient is φ = 25804800.

The previous prime is 121201489. The next prime is 121201519. The reversal of 121201500 is 5102121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 1249452 + ... + 1249548.

It is an arithmetic number, because the mean of its divisors is an integer number (1524978).

Almost surely, 2121201500 is an apocalyptic number.

121201500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121201500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219596832).

121201500 is an abundant number, since it is smaller than the sum of its proper divisors (317992164).

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

121201500 is a wasteful number, since it uses less digits than its factorization.

121201500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 121201500 is about 11009.1552809469. The cubic root of 121201500 is about 494.8831476036.

Adding to 121201500 its reverse (5102121), we get a palindrome (126303621).

The spelling of 121201500 in words is "one hundred twenty-one million, two hundred one thousand, five hundred".