2131121242997 has 2 divisors, whose sum is σ = 2131121242998. Its totient is φ = 2131121242996.

The previous prime is 2131121242949. The next prime is 2131121243039. The reversal of 2131121242997 is 7992421211312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2130084789361 + 1036453636 = 1459481^2 + 32194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131121242997 - 2⁸ = 2131121242741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131121242907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065560621498 + 1065560621499.

It is an arithmetic number, because the mean of its divisors is an integer number (1065560621499).

Almost surely, 2^{2131121242997} is an apocalyptic number.

It is an amenable number.

2131121242997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131121242997 is an equidigital number, since it uses as much as digits as its factorization.

2131121242997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The spelling of 2131121242997 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred forty-two thousand, nine hundred ninety-seven".