22021112222100 has 108 divisors (see below), whose sum is σ = 70707464029020. Its totient is φ = 5729069836800.

The previous prime is 22021112222089. The next prime is 22021112222101. The reversal of 22021112222100 is 122221112022.

It is a happy number.

22021112222100 is a `hidden beast` number, since 2 + 20 + 211 + 1 + 222 + 210 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 11540845541124 + 10480266680976 = 3397182^2 + 3237324^2 .

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 (22021112222101) 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, 298352155 + ... + 298425954.

Almost surely, 2^{22021112222100} is an apocalyptic number.

22021112222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021112222100 is an abundant number, since it is smaller than the sum of its proper divisors (48686351806920).

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

22021112222100 is a wasteful number, since it uses less digits than its factorization.

22021112222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596778170 (or 596778160 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021112222100 its reverse (122221112022), we get a palindrome (22143333334122).

The spelling of 22021112222100 in words is "twenty-two trillion, twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, one hundred".