121010121020 has 24 divisors (see below), whose sum is σ = 254138039568. Its totient is φ = 48400851200.

The previous prime is 121010120989. The next prime is 121010121031. The reversal of 121010121020 is 20121010121.

It is a junction number, because it is equal to n+sod(n) for n = 121010120992 and 121010121010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123275 + ... + 507165.

It is an arithmetic number, because the mean of its divisors is an integer number (10589084982).

Almost surely, 2^121010121020 is an apocalyptic number.

121010121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121010121020 is an abundant number, since it is smaller than the sum of its proper divisors (133127918548).

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

121010121020 is a wasteful number, since it uses less digits than its factorization.

121010121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399661 (or 399659 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121010121020 its reverse (20121010121), we get a palindrome (141131131141).

The spelling of 121010121020 in words is "one hundred twenty-one billion, ten million, one hundred twenty-one thousand, twenty".