121311120000020 has 48 divisors (see below), whose sum is σ = 268461560884608. Its totient is φ = 45955137993600.

The previous prime is 121311120000013. The next prime is 121311120000023. The reversal of 121311120000020 is 20000021113121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311120000023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1305497234 + ... + 1305590153.

It is an arithmetic number, because the mean of its divisors is an integer number (5592949185096).

Almost surely, 2^{121311120000020} is an apocalyptic number.

121311120000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311120000020 is an abundant number, since it is smaller than the sum of its proper divisors (147150440884588).

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

121311120000020 is a wasteful number, since it uses less digits than its factorization.

121311120000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611087520 (or 2611087518 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121311120000020 its reverse (20000021113121), we get a palindrome (141311141113141).

The spelling of 121311120000020 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred twenty million, twenty", and thus it is an aban number.