221222022121110 has 32 divisors (see below), whose sum is σ = 536898390772320. Its totient is φ = 58329701712128.

The previous prime is 221222022121091. The next prime is 221222022121181. The reversal of 221222022121110 is 11121220222122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41427342297 + ... + 41427347636.

It is an arithmetic number, because the mean of its divisors is an integer number (16778074711635).

Almost surely, 2^{221222022121110} is an apocalyptic number.

221222022121110 is an abundant number, since it is smaller than the sum of its proper divisors (315676368651210).

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

221222022121110 is a wasteful number, since it uses less digits than its factorization.

221222022121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82854690032.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221222022121110 its reverse (11121220222122), we get a palindrome (232343242343232).

The spelling of 221222022121110 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred twenty-one thousand, one hundred ten".