2101031311031 has 4 divisors (see below), whose sum is σ = 2101337724672. Its totient is φ = 2100724897392.

The previous prime is 2101031311021. The next prime is 2101031311069. The reversal of 2101031311031 is 1301131301012.

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 2101031311031 - 2³⁸ = 1826153404087 is a prime.

It is a super-2 number, since 2×2101031311031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101031311021) 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, 153196535 + ... + 153210248.

It is an arithmetic number, because the mean of its divisors is an integer number (525334431168).

Almost surely, 2^{2101031311031} is an apocalyptic number.

2101031311031 is a deficient number, since it is larger than the sum of its proper divisors (306413641).

2101031311031 is an equidigital number, since it uses as much as digits as its factorization.

2101031311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306413640.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 2101031311031 its reverse (1301131301012), we get a palindrome (3402162612043).

The spelling of 2101031311031 in words is "two trillion, one hundred one billion, thirty-one million, three hundred eleven thousand, thirty-one".