22021212212100 has 144 divisors (see below), whose sum is σ = 70911918360640. Its totient is φ = 5862551904000.

The previous prime is 22021212212093. The next prime is 22021212212141. The reversal of 22021212212100 is 121221212022.

It is a happy number.

22021212212100 is a `hidden beast` number, since 2 + 20 + 212 + 1 + 221 + 210 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 5162662 + ... + 8408061.

Almost surely, 2^{22021212212100} is an apocalyptic number.

22021212212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021212212100 is an abundant number, since it is smaller than the sum of its proper divisors (48890706148540).

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

22021212212100 is a wasteful number, since it uses less digits than its factorization.

22021212212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13571347 (or 13571334 counting only the distinct ones).

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

Adding to 22021212212100 its reverse (121221212022), we get a palindrome (22142433424122).

The spelling of 22021212212100 in words is "twenty-two trillion, twenty-one billion, two hundred twelve million, two hundred twelve thousand, one hundred".