222221121011100 has 72 divisors (see below), whose sum is σ = 714399751999920. Its totient is φ = 59258965602240.

The previous prime is 222221121011063. The next prime is 222221121011107. The reversal of 222221121011100 is 1110121122222.

222221121011100 is a `hidden beast` number, since 2 + 222 + 211 + 210 + 11 + 10 + 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 (222221121011107) 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, 41152056747 + ... + 41152062146.

Almost surely, 2^{222221121011100} is an apocalyptic number.

222221121011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221121011100 is an abundant number, since it is smaller than the sum of its proper divisors (492178630988820).

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

222221121011100 is a wasteful number, since it uses less digits than its factorization.

222221121011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82304118916 (or 82304118903 counting only the distinct ones).

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

Adding to 222221121011100 its reverse (1110121122222), we get a palindrome (223331242133322).

The spelling of 222221121011100 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, eleven thousand, one hundred".