221022012112 has 20 divisors (see below), whose sum is σ = 467160162336. Its totient is φ = 100464550880.

The previous prime is 221022012089. The next prime is 221022012173. The reversal of 221022012112 is 211210220122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627903268 + ... + 627903619.

Almost surely, 2^221022012112 is an apocalyptic number.

221022012112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221022012112 is an abundant number, since it is smaller than the sum of its proper divisors (246138150224).

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

221022012112 is a wasteful number, since it uses less digits than its factorization.

221022012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255806906 (or 1255806900 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221022012112 its reverse (211210220122), we get a palindrome (432232232234).

The spelling of 221022012112 in words is "two hundred twenty-one billion, twenty-two million, twelve thousand, one hundred twelve".