3121011221004 has 36 divisors (see below), whose sum is σ = 7889276579184. Its totient is φ = 1040329983072.

The previous prime is 3121011220913. The next prime is 3121011221017. The reversal of 3121011221004 is 4001221101213.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×3121011221004² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9600694 + ... + 9920450.

It is an arithmetic number, because the mean of its divisors is an integer number (219146571644).

Almost surely, 2^{3121011221004} is an apocalyptic number.

It is an amenable number.

3121011221004 is an abundant number, since it is smaller than the sum of its proper divisors (4768265358180).

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

3121011221004 is a wasteful number, since it uses less digits than its factorization.

3121011221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590894 (or 590889 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 3121011221004 its reverse (4001221101213), we get a palindrome (7122232322217).

The spelling of 3121011221004 in words is "three trillion, one hundred twenty-one billion, eleven million, two hundred twenty-one thousand, four".