33121354921 has 4 divisors (see below), whose sum is σ = 33146467200. Its totient is φ = 33096242644.

The previous prime is 33121354883. The next prime is 33121354951. The reversal of 33121354921 is 12945312133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33121354921 - 2¹³ = 33121346729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33121354951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12554161 + ... + 12556798.

It is an arithmetic number, because the mean of its divisors is an integer number (8286616800).

Almost surely, 2^33121354921 is an apocalyptic number.

It is an amenable number.

33121354921 is a deficient number, since it is larger than the sum of its proper divisors (25112279).

33121354921 is a wasteful number, since it uses less digits than its factorization.

33121354921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25112278.

The product of its digits is 19440, while the sum is 34.

The spelling of 33121354921 in words is "thirty-three billion, one hundred twenty-one million, three hundred fifty-four thousand, nine hundred twenty-one".