2131011121111 has 16 divisors (see below), whose sum is σ = 2154695132160. Its totient is φ = 2107379671200.

The previous prime is 2131011121093. The next prime is 2131011121147. The reversal of 2131011121111 is 1111211101312.

It is a cyclic number.

It is not a de Polignac number, because 2131011121111 - 2²¹ = 2131009023959 is a prime.

It is a super-2 number, since 2×2131011121111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131011121711) 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, 391511356 + ... + 391516798.

It is an arithmetic number, because the mean of its divisors is an integer number (134668445760).

Almost surely, 2^{2131011121111} is an apocalyptic number.

2131011121111 is a deficient number, since it is larger than the sum of its proper divisors (23684011049).

2131011121111 is a wasteful number, since it uses less digits than its factorization.

2131011121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 2131011121111 its reverse (1111211101312), we get a palindrome (3242222222423).

The spelling of 2131011121111 in words is "two trillion, one hundred thirty-one billion, eleven million, one hundred twenty-one thousand, one hundred eleven".