221110101011100 has 144 divisors (see below), whose sum is σ = 731141910867200. Its totient is φ = 50539139896320.

The previous prime is 221110101011099. The next prime is 221110101011171. The reversal of 221110101011100 is 1110101011122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 654062916 + ... + 654400884.

Almost surely, 2^{221110101011100} is an apocalyptic number.

221110101011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110101011100 is an abundant number, since it is smaller than the sum of its proper divisors (510031809856100).

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

221110101011100 is a wasteful number, since it uses less digits than its factorization.

221110101011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649532 (or 649525 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 221110101011100 its reverse (1110101011122), we get a palindrome (222220202022222).

The spelling of 221110101011100 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred one million, eleven thousand, one hundred".