121002010000020 has 72 divisors (see below), whose sum is σ = 367077545802240. Its totient is φ = 32263851856320.

The previous prime is 121002009999967. The next prime is 121002010000093. The reversal of 121002010000020 is 20000010200121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121002009999957 and 121002010000011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33165880 + ... + 36633039.

Almost surely, 2^{121002010000020} is an apocalyptic number.

121002010000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002010000020 is an abundant number, since it is smaller than the sum of its proper divisors (246075535802220).

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

121002010000020 is a wasteful number, since it uses less digits than its factorization.

121002010000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69808565 (or 69808560 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121002010000020 its reverse (20000010200121), we get a palindrome (141002020200141).

The spelling of 121002010000020 in words is "one hundred twenty-one trillion, two billion, ten million, twenty", and thus it is an aban number.