33121901 has 2 divisors, whose sum is σ = 33121902. Its totient is φ = 33121900.

The previous prime is 33121867. The next prime is 33121927. The reversal of 33121901 is 10912133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31933801 + 1188100 = 5651^2 + 1090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33121901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33121931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560950 + 16560951.

It is an arithmetic number, because the mean of its divisors is an integer number (16560951).

Almost surely, 2^33121901 is an apocalyptic number.

It is an amenable number.

33121901 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121901 is an equidigital number, since it uses as much as digits as its factorization.

33121901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 33121901 is about 5755.1629863975. The cubic root of 33121901 is about 321.1478988365.

The spelling of 33121901 in words is "thirty-three million, one hundred twenty-one thousand, nine hundred one".