33402640121 has 4 divisors (see below), whose sum is σ = 33447597312. Its totient is φ = 33357682932.

The previous prime is 33402640097. The next prime is 33402640171. The reversal of 33402640121 is 12104620433.

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 33402640121 - 2¹⁸ = 33402377977 is a prime.

It is a super-2 number, since 2×33402640121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33402640171) 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, 22477481 + ... + 22478966.

It is an arithmetic number, because the mean of its divisors is an integer number (8361899328).

Almost surely, 2^33402640121 is an apocalyptic number.

It is an amenable number.

33402640121 is a deficient number, since it is larger than the sum of its proper divisors (44957191).

33402640121 is an equidigital number, since it uses as much as digits as its factorization.

33402640121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44957190.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 33402640121 in words is "thirty-three billion, four hundred two million, six hundred forty thousand, one hundred twenty-one".