3121013111420 has 24 divisors (see below), whose sum is σ = 6558310195584. Its totient is φ = 1247608547136.

The previous prime is 3121013111413. The next prime is 3121013111423. The reversal of 3121013111420 is 241113101213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3121013111392 and 3121013111401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121013111423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49761467 + ... + 49824146.

It is an arithmetic number, because the mean of its divisors is an integer number (273262924816).

Almost surely, 2^{3121013111420} is an apocalyptic number.

It is an amenable number.

3121013111420 is an abundant number, since it is smaller than the sum of its proper divisors (3437297084164).

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

3121013111420 is a wasteful number, since it uses less digits than its factorization.

3121013111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99587189 (or 99587187 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 3121013111420 its reverse (241113101213), we get a palindrome (3362126212633).

The spelling of 3121013111420 in words is "three trillion, one hundred twenty-one billion, thirteen million, one hundred eleven thousand, four hundred twenty".