2001231002131 has 16 divisors (see below), whose sum is σ = 2024419461120. Its totient is φ = 1978171272000.

The previous prime is 2001231002129. The next prime is 2001231002137. The reversal of 2001231002131 is 1312001321002.

It is a cyclic number.

It is not a de Polignac number, because 2001231002131 - 2¹ = 2001231002129 is a prime.

It is a super-2 number, since 2×2001231002131² (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 (2001231002137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200780710 + ... + 200790676.

It is an arithmetic number, because the mean of its divisors is an integer number (126526216320).

Almost surely, 2^{2001231002131} is an apocalyptic number.

2001231002131 is a deficient number, since it is larger than the sum of its proper divisors (23188458989).

2001231002131 is a wasteful number, since it uses less digits than its factorization.

2001231002131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2001231002131 its reverse (1312001321002), we get a palindrome (3313232323133).

The spelling of 2001231002131 in words is "two trillion, one billion, two hundred thirty-one million, two thousand, one hundred thirty-one".