338903707221 has 24 divisors (see below), whose sum is σ = 496565147520. Its totient is φ = 222689527200.

The previous prime is 338903707217. The next prime is 338903707231. The reversal of 338903707221 is 122707309833.

338903707221 is a `hidden beast` number, since 338 + 90 + 3 + 7 + 0 + 7 + 221 = 666.

338903707221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 338903707221 - 2² = 338903707217 is a prime.

It is a super-2 number, since 2×338903707221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338903707211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2199691 + ... + 2348711.

It is an arithmetic number, because the mean of its divisors is an integer number (20690214480).

Almost surely, 2^338903707221 is an apocalyptic number.

It is an amenable number.

338903707221 is a deficient number, since it is larger than the sum of its proper divisors (157661440299).

338903707221 is a wasteful number, since it uses less digits than its factorization.

338903707221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152657 (or 152654 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 338903707221 in words is "three hundred thirty-eight billion, nine hundred three million, seven hundred seven thousand, two hundred twenty-one".