33381317421 has 48 divisors (see below), whose sum is σ = 52473308160. Its totient is φ = 20387220480.

The previous prime is 33381317407. The next prime is 33381317441. The reversal of 33381317421 is 12471318333.

33381317421 is a `hidden beast` number, since 3 + 338 + 1 + 317 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 33381317421 - 2¹³ = 33381309229 is a prime.

It is a super-2 number, since 2×33381317421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33381317441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 595635 + ... + 649263.

It is an arithmetic number, because the mean of its divisors is an integer number (1093193920).

Almost surely, 2^33381317421 is an apocalyptic number.

33381317421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33381317421 is a deficient number, since it is larger than the sum of its proper divisors (19091990739).

33381317421 is a wasteful number, since it uses less digits than its factorization.

33381317421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53786 (or 53783 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The spelling of 33381317421 in words is "thirty-three billion, three hundred eighty-one million, three hundred seventeen thousand, four hundred twenty-one".