221201022112110 has 48 divisors (see below), whose sum is σ = 590666513108256. Its totient is φ = 57392697628224.

The previous prime is 221201022112067. The next prime is 221201022112111. The reversal of 221201022112110 is 11211220102122.

221201022112110 is a `hidden beast` number, since 22 + 120 + 102 + 211 + 211 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201022112111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33213363354 + ... + 33213370013.

It is an arithmetic number, because the mean of its divisors is an integer number (12305552356422).

Almost surely, 2^{221201022112110} is an apocalyptic number.

221201022112110 is an abundant number, since it is smaller than the sum of its proper divisors (369465490996146).

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

221201022112110 is a wasteful number, since it uses less digits than its factorization.

221201022112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66426733417 (or 66426733414 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221201022112110 its reverse (11211220102122), we get a palindrome (232412242214232).

The spelling of 221201022112110 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-two million, one hundred twelve thousand, one hundred ten".