3101232121220 has 12 divisors (see below), whose sum is σ = 6512587454604. Its totient is φ = 1240492848480.

The previous prime is 3101232121219. The next prime is 3101232121231. The reversal of 3101232121220 is 221212321013.

It can be written as a sum of positive squares in 2 ways, for example, as 766594806916 + 2334637314304 = 875554^2 + 1527952^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 155061606061 = 3101232121220 / (3 + 1 + 0 + 1 + 2 + 3 + 2 + 1 + 2 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 3101232121192 and 3101232121201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77530803011 + ... + 77530803050.

It is an arithmetic number, because the mean of its divisors is an integer number (542715621217).

Almost surely, 2^{3101232121220} is an apocalyptic number.

It is an amenable number.

3101232121220 is an abundant number, since it is smaller than the sum of its proper divisors (3411355333384).

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

3101232121220 is a wasteful number, since it uses less digits than its factorization.

3101232121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155061606070 (or 155061606068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 3101232121220 its reverse (221212321013), we get a palindrome (3322444442233).

The spelling of 3101232121220 in words is "three trillion, one hundred one billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".