221210222212194 has 128 divisors (see below), whose sum is σ = 494465048985600. Its totient is φ = 65564754877440.

The previous prime is 221210222212193. The next prime is 221210222212253. The reversal of 221210222212194 is 491212222012122.

It is a happy number.

It is a super-2 number, since 2×221210222212194² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221210222212193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7849608784 + ... + 7849636964.

It is an arithmetic number, because the mean of its divisors is an integer number (3863008195200).

Almost surely, 2^{221210222212194} is an apocalyptic number.

221210222212194 is an abundant number, since it is smaller than the sum of its proper divisors (273254826773406).

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

221210222212194 is a wasteful number, since it uses less digits than its factorization.

221210222212194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39288.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 221210222212194 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twelve thousand, one hundred ninety-four".