2131111111122 has 48 divisors (see below), whose sum is σ = 5296654359360. Its totient is φ = 606625351776.

The previous prime is 2131111111121. The next prime is 2131111111133. The reversal of 2131111111122 is 2211111111312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2131111111095 and 2131111111104.

It is not an unprimeable number, because it can be changed into a prime (2131111111121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31403988 + ... + 31471775.

It is an arithmetic number, because the mean of its divisors is an integer number (110346965820).

Almost surely, 2^{2131111111122} is an apocalyptic number.

2131111111122 is an abundant number, since it is smaller than the sum of its proper divisors (3165543248238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131111111122 is a wasteful number, since it uses less digits than its factorization.

2131111111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62876047 (or 62876044 counting only the distinct ones).

The product of its digits is 24, while the sum is 18.

Adding to 2131111111122 its reverse (2211111111312), we get a palindrome (4342222222434).

The spelling of 2131111111122 in words is "two trillion, one hundred thirty-one billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-two".