221215550005204 has 24 divisors (see below), whose sum is σ = 387330460593440. Its totient is φ = 110549710836576.

The previous prime is 221215550005201. The next prime is 221215550005231. The reversal of 221215550005204 is 402500055512122.

221215550005204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221215550005204² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221215550005204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221215550005201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132323659 + ... + 133985005.

Almost surely, 2^{221215550005204} is an apocalyptic number.

It is an amenable number.

221215550005204 is a deficient number, since it is larger than the sum of its proper divisors (166114910588236).

221215550005204 is a wasteful number, since it uses less digits than its factorization.

221215550005204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678807 (or 1678805 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 221215550005204 in words is "two hundred twenty-one trillion, two hundred fifteen billion, five hundred fifty million, five thousand, two hundred four".