33130111997 has 2 divisors, whose sum is σ = 33130111998. Its totient is φ = 33130111996.

The previous prime is 33130111991. The next prime is 33130112017. The reversal of 33130111997 is 79911103133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33061785241 + 68326756 = 181829^2 + 8266^2 .

It is a cyclic number.

It is not a de Polignac number, because 33130111997 - 2¹⁶ = 33130046461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33130111997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33130111991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16565055998 + 16565055999.

It is an arithmetic number, because the mean of its divisors is an integer number (16565055999).

Almost surely, 2^33130111997 is an apocalyptic number.

It is an amenable number.

33130111997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33130111997 is an equidigital number, since it uses as much as digits as its factorization.

33130111997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 38.

The spelling of 33130111997 in words is "thirty-three billion, one hundred thirty million, one hundred eleven thousand, nine hundred ninety-seven".