2012123220131 has 4 divisors (see below), whose sum is σ = 2012126455752. Its totient is φ = 2012119984512.

The previous prime is 2012123220113. The next prime is 2012123220139. The reversal of 2012123220131 is 1310223212102.

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 2012123220131 - 2²² = 2012119025827 is a prime.

It is a super-2 number, since 2×2012123220131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012123220139) 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 in 3 ways as a sum of consecutive naturals, for example, 358001 + ... + 2037746.

It is an arithmetic number, because the mean of its divisors is an integer number (503031613938).

Almost surely, 2^{2012123220131} is an apocalyptic number.

2012123220131 is a deficient number, since it is larger than the sum of its proper divisors (3235621).

2012123220131 is an equidigital number, since it uses as much as digits as its factorization.

2012123220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235620.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2012123220131 its reverse (1310223212102), we get a palindrome (3322346432233).

The spelling of 2012123220131 in words is "two trillion, twelve billion, one hundred twenty-three million, two hundred twenty thousand, one hundred thirty-one".