2001310221131 has 4 divisors (see below), whose sum is σ = 2155257161232. Its totient is φ = 1847363281032.

The previous prime is 2001310221107. The next prime is 2001310221187. The reversal of 2001310221131 is 1311220131002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001310221131 is a prime.

It is a super-2 number, since 2×2001310221131² (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 (2001310221431) 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, 76973470031 + ... + 76973470056.

It is an arithmetic number, because the mean of its divisors is an integer number (538814290308).

Almost surely, 2^{2001310221131} is an apocalyptic number.

2001310221131 is a deficient number, since it is larger than the sum of its proper divisors (153946940101).

2001310221131 is a wasteful number, since it uses less digits than its factorization.

2001310221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153946940100.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2001310221131 its reverse (1311220131002), we get a palindrome (3312530352133).

The spelling of 2001310221131 in words is "two trillion, one billion, three hundred ten million, two hundred twenty-one thousand, one hundred thirty-one".