2102112311231 has 4 divisors (see below), whose sum is σ = 2102115476472. Its totient is φ = 2102109145992.

The previous prime is 2102112311219. The next prime is 2102112311293. The reversal of 2102112311231 is 1321132112012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102112311231 - 2³⁸ = 1827234404287 is a prime.

It is a super-2 number, since 2×2102112311231² (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 (2102112391231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160421 + ... + 2056686.

It is an arithmetic number, because the mean of its divisors is an integer number (525528869118).

Almost surely, 2^{2102112311231} is an apocalyptic number.

2102112311231 is a deficient number, since it is larger than the sum of its proper divisors (3165241).

2102112311231 is an equidigital number, since it uses as much as digits as its factorization.

2102112311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165240.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2102112311231 its reverse (1321132112012), we get a palindrome (3423244423243).

The spelling of 2102112311231 in words is "two trillion, one hundred two billion, one hundred twelve million, three hundred eleven thousand, two hundred thirty-one".