20312332121220 has 96 divisors (see below), whose sum is σ = 57622336402176. Its totient is φ = 5345747136000.

The previous prime is 20312332121171. The next prime is 20312332121267. The reversal of 20312332121220 is 2212123321302.

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, 3504199 + ... + 7273518.

It is an arithmetic number, because the mean of its divisors is an integer number (600232670856).

Almost surely, 2^{20312332121220} is an apocalyptic number.

20312332121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312332121220 is an abundant number, since it is smaller than the sum of its proper divisors (37310004280956).

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

20312332121220 is a wasteful number, since it uses less digits than its factorization.

20312332121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778141 (or 10778139 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20312332121220 its reverse (2212123321302), we get a palindrome (22524455442522).

The spelling of 20312332121220 in words is "twenty trillion, three hundred twelve billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".