121020020021010 has 256 divisors, whose sum is σ = 326736523491840. Its totient is φ = 28437626880000.

The previous prime is 121020020020951. The next prime is 121020020021039. The reversal of 121020020021010 is 10120020020121.

It is a super-2 number, since 2×121020020021010² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 814277586 + ... + 814426194.

It is an arithmetic number, because the mean of its divisors is an integer number (1276314544890).

Almost surely, 2^{121020020021010} is an apocalyptic number.

121020020021010 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 121020020021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163368261745920).

121020020021010 is an abundant number, since it is smaller than the sum of its proper divisors (205716503470830).

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

121020020021010 is a wasteful number, since it uses less digits than its factorization.

121020020021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149245.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121020020021010 its reverse (10120020020121), we get a palindrome (131140040041131).

The spelling of 121020020021010 in words is "one hundred twenty-one trillion, twenty billion, twenty million, twenty-one thousand, ten".