2131023212249 has 2 divisors, whose sum is σ = 2131023212250. Its totient is φ = 2131023212248.

The previous prime is 2131023212203. The next prime is 2131023212359. The reversal of 2131023212249 is 9422123201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540689150025 + 590334062224 = 1241245^2 + 768332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131023212249 is a prime.

It is a super-2 number, since 2×2131023212249² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2131023202249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065511606124 + 1065511606125.

It is an arithmetic number, because the mean of its divisors is an integer number (1065511606125).

Almost surely, 2^{2131023212249} is an apocalyptic number.

It is an amenable number.

2131023212249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131023212249 is an equidigital number, since it uses as much as digits as its factorization.

2131023212249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 2131023212249 in words is "two trillion, one hundred thirty-one billion, twenty-three million, two hundred twelve thousand, two hundred forty-nine".