221222321232210 has 48 divisors (see below), whose sum is σ = 581107705692696. Its totient is φ = 58384447663104.

The previous prime is 221222321232127. The next prime is 221222321232223. The reversal of 221222321232210 is 12232123222122.

221222321232210 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 2 + 2 + 321 + 2 + 322 + 10 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 163573637947281 + 57648683284929 = 12789591^2 + 7592673^2 .

It is a super-2 number, since 2×221222321232210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12670227309 + ... + 12670244768.

Almost surely, 2^{221222321232210} is an apocalyptic number.

221222321232210 is an abundant number, since it is smaller than the sum of its proper divisors (359885384460486).

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

221222321232210 is a wasteful number, since it uses less digits than its factorization.

221222321232210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25340472187 (or 25340472184 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221222321232210 its reverse (12232123222122), we get a palindrome (233454444454332).

The spelling of 221222321232210 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, three hundred twenty-one million, two hundred thirty-two thousand, two hundred ten".