221111010111100 has 36 divisors (see below), whose sum is σ = 479817853362064. Its totient is φ = 88443120833280.

The previous prime is 221111010111049. The next prime is 221111010111113. The reversal of 221111010111100 is 1111010111122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9098304 + ... + 22912903.

Almost surely, 2^{221111010111100} is an apocalyptic number.

221111010111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111010111100 is an abundant number, since it is smaller than the sum of its proper divisors (258706843250964).

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

221111010111100 is a wasteful number, since it uses less digits than its factorization.

221111010111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32080294 (or 32080287 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 221111010111100 its reverse (1111010111122), we get a palindrome (222222020222222).

The spelling of 221111010111100 in words is "two hundred twenty-one trillion, one hundred eleven billion, ten million, one hundred eleven thousand, one hundred".