2103221031931 has 2 divisors, whose sum is σ = 2103221031932. Its totient is φ = 2103221031930.

The previous prime is 2103221031887. The next prime is 2103221032001. The reversal of 2103221031931 is 1391301223012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2103221031931 - 2²⁷ = 2103086814203 is a prime.

It is a super-2 number, since 2×2103221031931² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2103221031931.

It is not a weakly prime, because it can be changed into another prime (2103221031631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051610515965 + 1051610515966.

It is an arithmetic number, because the mean of its divisors is an integer number (1051610515966).

Almost surely, 2^{2103221031931} is an apocalyptic number.

2103221031931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103221031931 is an equidigital number, since it uses as much as digits as its factorization.

2103221031931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 2103221031931 its reverse (1391301223012), we get a palindrome (3494522254943).

The spelling of 2103221031931 in words is "two trillion, one hundred three billion, two hundred twenty-one million, thirty-one thousand, nine hundred thirty-one".