221100022212111 has 96 divisors (see below), whose sum is σ = 384404807474688. Its totient is φ = 119808923109120.

The previous prime is 221100022212103. The next prime is 221100022212169. The reversal of 221100022212111 is 111212220001122.

221100022212111 is a `hidden beast` number, since 221 + 10 + 0 + 0 + 2 + 221 + 211 + 1 = 666.

It is not a de Polignac number, because 221100022212111 - 2³ = 221100022212103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100022212011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 43814940 + ... + 48599886.

It is an arithmetic number, because the mean of its divisors is an integer number (4004216744528).

Almost surely, 2^{221100022212111} is an apocalyptic number.

221100022212111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221100022212111 is a deficient number, since it is larger than the sum of its proper divisors (163304785262577).

221100022212111 is a wasteful number, since it uses less digits than its factorization.

221100022212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785501 (or 4785498 counting only the distinct ones).

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

Adding to 221100022212111 its reverse (111212220001122), we get a palindrome (332312242213233).

The spelling of 221100022212111 in words is "two hundred twenty-one trillion, one hundred billion, twenty-two million, two hundred twelve thousand, one hundred eleven".