3121020010111 has 16 divisors (see below), whose sum is σ = 3318677127360. Its totient is φ = 2929866983680.

The previous prime is 3121020010099. The next prime is 3121020010151. The reversal of 3121020010111 is 1110100201213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3121020010111 - 2⁵ = 3121020010079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121020010091 and 3121020010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121020010151) 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, 4130995 + ... + 4827748.

It is an arithmetic number, because the mean of its divisors is an integer number (207417320460).

Almost surely, 2^{3121020010111} is an apocalyptic number.

3121020010111 is a deficient number, since it is larger than the sum of its proper divisors (197657117249).

3121020010111 is a wasteful number, since it uses less digits than its factorization.

3121020010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8959106.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 3121020010111 its reverse (1110100201213), we get a palindrome (4231120211324).

The spelling of 3121020010111 in words is "three trillion, one hundred twenty-one billion, twenty million, ten thousand, one hundred eleven".