33120001997 has 2 divisors, whose sum is σ = 33120001998. Its totient is φ = 33120001996.

The previous prime is 33120001933. The next prime is 33120002011. The reversal of 33120001997 is 79910002133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18120121321 + 14999880676 = 134611^2 + 122474^2 .

It is a cyclic number.

It is not a de Polignac number, because 33120001997 - 2⁶ = 33120001933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33120001907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560000998 + 16560000999.

It is an arithmetic number, because the mean of its divisors is an integer number (16560000999).

Almost surely, 2^33120001997 is an apocalyptic number.

It is an amenable number.

33120001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33120001997 is an equidigital number, since it uses as much as digits as its factorization.

33120001997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The spelling of 33120001997 in words is "thirty-three billion, one hundred twenty million, one thousand, nine hundred ninety-seven".