33500125421 has 36 divisors (see below), whose sum is σ = 41451631200. Its totient is φ = 26989474176.

The previous prime is 33500125411. The next prime is 33500125453. The reversal of 33500125421 is 12452100533.

It is a happy number.

It is not a de Polignac number, because 33500125421 - 2¹⁰ = 33500124397 is a prime.

It is a super-2 number, since 2×33500125421² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33500125411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17827760 + ... + 17829638.

It is an arithmetic number, because the mean of its divisors is an integer number (1151434200).

Almost surely, 2^33500125421 is an apocalyptic number.

It is an amenable number.

33500125421 is a deficient number, since it is larger than the sum of its proper divisors (7951505779).

33500125421 is a wasteful number, since it uses less digits than its factorization.

33500125421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 33500125421 its reverse (12452100533), we get a palindrome (45952225954).

The spelling of 33500125421 in words is "thirty-three billion, five hundred million, one hundred twenty-five thousand, four hundred twenty-one".