121020011020 has 24 divisors (see below), whose sum is σ = 254672611200. Its totient is φ = 48306940032.

The previous prime is 121020011017. The next prime is 121020011117. The reversal of 121020011020 is 20110020121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121020010988 and 121020011006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6306705 + ... + 6325864.

It is an arithmetic number, because the mean of its divisors is an integer number (10611358800).

Almost surely, 2^121020011020 is an apocalyptic number.

121020011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020011020 is an abundant number, since it is smaller than the sum of its proper divisors (133652600180).

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

121020011020 is a wasteful number, since it uses less digits than its factorization.

121020011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12633057 (or 12633055 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121020011020 its reverse (20110020121), we get a palindrome (141130031141).

The spelling of 121020011020 in words is "one hundred twenty-one billion, twenty million, eleven thousand, twenty".