2101231231097 has 2 divisors, whose sum is σ = 2101231231098. Its totient is φ = 2101231231096.

The previous prime is 2101231231093. The next prime is 2101231231123. The reversal of 2101231231097 is 7901321321012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1752073148281 + 349158082816 = 1323659^2 + 590896^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101231231097 - 2² = 2101231231093 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101231231093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050615615548 + 1050615615549.

It is an arithmetic number, because the mean of its divisors is an integer number (1050615615549).

Almost surely, 2^{2101231231097} is an apocalyptic number.

It is an amenable number.

2101231231097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101231231097 is an equidigital number, since it uses as much as digits as its factorization.

2101231231097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 2101231231097 in words is "two trillion, one hundred one billion, two hundred thirty-one million, two hundred thirty-one thousand, ninety-seven".