2001011232931 has 2 divisors, whose sum is σ = 2001011232932. Its totient is φ = 2001011232930.

The previous prime is 2001011232911. The next prime is 2001011233087. The reversal of 2001011232931 is 1392321101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001011232931 - 2⁹ = 2001011232419 is a prime.

It is a super-2 number, since 2×2001011232931² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001011232896 and 2001011232905.

It is not a weakly prime, because it can be changed into another prime (2001011232911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000505616465 + 1000505616466.

It is an arithmetic number, because the mean of its divisors is an integer number (1000505616466).

Almost surely, 2^{2001011232931} is an apocalyptic number.

2001011232931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001011232931 is an equidigital number, since it uses as much as digits as its factorization.

2001011232931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 2001011232931 its reverse (1392321101002), we get a palindrome (3393332333933).

The spelling of 2001011232931 in words is "two trillion, one billion, eleven million, two hundred thirty-two thousand, nine hundred thirty-one".