33121403120 has 40 divisors (see below), whose sum is σ = 82930900416. Its totient is φ = 12229440768.

The previous prime is 33121403111. The next prime is 33121403131. The reversal of 33121403120 is 2130412133.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33121403092 and 33121403101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15922712 + ... + 15924791.

Almost surely, 2^33121403120 is an apocalyptic number.

It is an amenable number.

33121403120 is an abundant number, since it is smaller than the sum of its proper divisors (49809497296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33121403120 is a wasteful number, since it uses less digits than its factorization.

33121403120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31847529 (or 31847523 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33121403120 its reverse (2130412133), we get a palindrome (35251815253).

The spelling of 33121403120 in words is "thirty-three billion, one hundred twenty-one million, four hundred three thousand, one hundred twenty".