3123103111021 has 16 divisors (see below), whose sum is σ = 3150882370944. Its totient is φ = 3095483338944.

The previous prime is 3123103111013. The next prime is 3123103111027. The reversal of 3123103111021 is 1201113013213.

It is a cyclic number.

It is not a de Polignac number, because 3123103111021 - 2³ = 3123103111013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3123103111021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123103111027) 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, 42738111 + ... + 42811123.

It is an arithmetic number, because the mean of its divisors is an integer number (196930148184).

Almost surely, 2^{3123103111021} is an apocalyptic number.

It is an amenable number.

3123103111021 is a deficient number, since it is larger than the sum of its proper divisors (27779259923).

3123103111021 is a wasteful number, since it uses less digits than its factorization.

3123103111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74100.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 3123103111021 its reverse (1201113013213), we get a palindrome (4324216124234).

The spelling of 3123103111021 in words is "three trillion, one hundred twenty-three billion, one hundred three million, one hundred eleven thousand, twenty-one".