2111109090631 has 2 divisors, whose sum is σ = 2111109090632. Its totient is φ = 2111109090630.

The previous prime is 2111109090527. The next prime is 2111109090637. The reversal of 2111109090631 is 1360909011112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111109090631 is a prime.

It is a super-2 number, since 2×2111109090631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111109090637) 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 as a sum of consecutive naturals, namely, 1055554545315 + 1055554545316.

It is an arithmetic number, because the mean of its divisors is an integer number (1055554545316).

Almost surely, 2^{2111109090631} is an apocalyptic number.

2111109090631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111109090631 is an equidigital number, since it uses as much as digits as its factorization.

2111109090631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 2111109090631 in words is "two trillion, one hundred eleven billion, one hundred nine million, ninety thousand, six hundred thirty-one".