121031320020 has 96 divisors (see below), whose sum is σ = 365016758400. Its totient is φ = 29787363840.

The previous prime is 121031319991. The next prime is 121031320031. The reversal of 121031320020 is 20023130121.

121031320020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 7394806 + ... + 7411154.

It is an arithmetic number, because the mean of its divisors is an integer number (3802257900).

Almost surely, 2^121031320020 is an apocalyptic number.

121031320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121031320020 is an abundant number, since it is smaller than the sum of its proper divisors (243985438380).

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

121031320020 is a wasteful number, since it uses less digits than its factorization.

121031320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25865 (or 25863 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121031320020 its reverse (20023130121), we get a palindrome (141054450141).

The spelling of 121031320020 in words is "one hundred twenty-one billion, thirty-one million, three hundred twenty thousand, twenty".