33020120981 has 2 divisors, whose sum is σ = 33020120982. Its totient is φ = 33020120980.

The previous prime is 33020120941. The next prime is 33020120993. The reversal of 33020120981 is 18902102033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31973016100 + 1047104881 = 178810^2 + 32359^2 .

It is an emirp because it is prime and its reverse (18902102033) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33020120981 is a prime.

It is a super-2 number, since 2×33020120981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33020120941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510060490 + 16510060491.

It is an arithmetic number, because the mean of its divisors is an integer number (16510060491).

Almost surely, 2^33020120981 is an apocalyptic number.

It is an amenable number.

33020120981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33020120981 is an equidigital number, since it uses as much as digits as its factorization.

33020120981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 33020120981 in words is "thirty-three billion, twenty million, one hundred twenty thousand, nine hundred eighty-one".