2011102111231 has 2 divisors, whose sum is σ = 2011102111232. Its totient is φ = 2011102111230.

The previous prime is 2011102111229. The next prime is 2011102111237. The reversal of 2011102111231 is 1321112011102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011102111231 - 2¹ = 2011102111229 is a prime.

It is a super-2 number, since 2×2011102111231² (a number of 25 digits) contains 22 as substring.

Together with 2011102111229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011102111237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005551055615 + 1005551055616.

It is an arithmetic number, because the mean of its divisors is an integer number (1005551055616).

Almost surely, 2^{2011102111231} is an apocalyptic number.

2011102111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011102111231 is an equidigital number, since it uses as much as digits as its factorization.

2011102111231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2011102111231 its reverse (1321112011102), we get a palindrome (3332214122333).

The spelling of 2011102111231 in words is "two trillion, eleven billion, one hundred two million, one hundred eleven thousand, two hundred thirty-one".