2011291239931 has 4 divisors (see below), whose sum is σ = 2011334650864. Its totient is φ = 2011247829000.

The previous prime is 2011291239929. The next prime is 2011291239959. The reversal of 2011291239931 is 1399321921102.

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 2011291239931 - 2¹ = 2011291239929 is a prime.

It is a super-2 number, since 2×2011291239931² (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 (2011291239731) 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, 21635895 + ... + 21728656.

It is an arithmetic number, because the mean of its divisors is an integer number (502833662716).

Almost surely, 2^{2011291239931} is an apocalyptic number.

2011291239931 is a deficient number, since it is larger than the sum of its proper divisors (43410933).

2011291239931 is an equidigital number, since it uses as much as digits as its factorization.

2011291239931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43410932.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 2011291239931 in words is "two trillion, eleven billion, two hundred ninety-one million, two hundred thirty-nine thousand, nine hundred thirty-one".