221201022123112 has 64 divisors (see below), whose sum is σ = 416646703549440. Its totient is φ = 110096687289600.

The previous prime is 221201022123061. The next prime is 221201022123127. The reversal of 221201022123112 is 211321220102122.

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, 2758386937 + ... + 2758467127.

It is an arithmetic number, because the mean of its divisors is an integer number (6510104742960).

Almost surely, 2^{221201022123112} is an apocalyptic number.

It is an amenable number.

221201022123112 is a deficient number, since it is larger than the sum of its proper divisors (195445681426328).

221201022123112 is a wasteful number, since it uses less digits than its factorization.

221201022123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82442 (or 82438 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221201022123112 its reverse (211321220102122), we get a palindrome (432522242225234).

The spelling of 221201022123112 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-two million, one hundred twenty-three thousand, one hundred twelve".