2113031220997 has 2 divisors, whose sum is σ = 2113031220998. Its totient is φ = 2113031220996.

The previous prime is 2113031220991. The next prime is 2113031221061. The reversal of 2113031220997 is 7990221303112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071817101796 + 1041214119201 = 1035286^2 + 1020399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113031220997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113031220991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056515610498 + 1056515610499.

It is an arithmetic number, because the mean of its divisors is an integer number (1056515610499).

Almost surely, 2^{2113031220997} is an apocalyptic number.

It is an amenable number.

2113031220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113031220997 is an equidigital number, since it uses as much as digits as its factorization.

2113031220997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 2113031220997 in words is "two trillion, one hundred thirteen billion, thirty-one million, two hundred twenty thousand, nine hundred ninety-seven".