2131222110012 has 36 divisors (see below), whose sum is σ = 5512540913880. Its totient is φ = 693886267872.

The previous prime is 2131222110011. The next prime is 2131222110029. The reversal of 2131222110012 is 2100112221312.

2131222110012 is a `hidden beast` number, since 21 + 312 + 221 + 100 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131222110011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688377687 + ... + 688380782.

Almost surely, 2^{2131222110012} is an apocalyptic number.

It is an amenable number.

2131222110012 is an abundant number, since it is smaller than the sum of its proper divisors (3381318803868).

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

2131222110012 is a wasteful number, since it uses less digits than its factorization.

2131222110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376758522 (or 1376758517 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2131222110012 its reverse (2100112221312), we get a palindrome (4231334331324).

The spelling of 2131222110012 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-two million, one hundred ten thousand, twelve".