222121220111100 has 108 divisors (see below), whose sum is σ = 703119957572760. Its totient is φ = 58645866672000.

The previous prime is 222121220111069. The next prime is 222121220111107. The reversal of 222121220111100 is 1111022121222.

222121220111100 is a `hidden beast` number, since 2 + 221 + 212 + 20 + 111 + 100 = 666.

222121220111100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (222121220111107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1221697990 + ... + 1221879789.

Almost surely, 2^{222121220111100} is an apocalyptic number.

222121220111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121220111100 is an abundant number, since it is smaller than the sum of its proper divisors (480998737461660).

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

222121220111100 is a wasteful number, since it uses less digits than its factorization.

222121220111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443577900 (or 2443577890 counting only the distinct ones).

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

Adding to 222121220111100 its reverse (1111022121222), we get a palindrome (223232242232322).

The spelling of 222121220111100 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, one hundred".