121000000000020 has 96 divisors (see below), whose sum is σ = 338885351804160. Its totient is φ = 32258539223040.

The previous prime is 121000000000007. The next prime is 121000000000057. The reversal of 121000000000020 is 20000000000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 120999999999918 and 121000000000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5766562449 + ... + 5766583431.

It is an arithmetic number, because the mean of its divisors is an integer number (3530055747960).

Almost surely, 2^{121000000000020} is an apocalyptic number.

121000000000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000000000020 is an abundant number, since it is smaller than the sum of its proper divisors (217885351804140).

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

121000000000020 is a wasteful number, since it uses less digits than its factorization.

121000000000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40625 (or 40623 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 121000000000020 its reverse (20000000000121), we get a palindrome (141000000000141).

The spelling of 121000000000020 in words is "one hundred twenty-one trillion, twenty", and thus it is an aban number.