22001211221100 has 144 divisors (see below), whose sum is σ = 67631683274400. Its totient is φ = 5511580139520.

The previous prime is 22001211221053. The next prime is 22001211221107. The reversal of 22001211221100 is 112211210022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22001211221100.

It is not an unprimeable number, because it can be changed into a prime (22001211221107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33852085 + ... + 34495884.

Almost surely, 2^{22001211221100} is an apocalyptic number.

22001211221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001211221100 is an abundant number, since it is smaller than the sum of its proper divisors (45630472053300).

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

22001211221100 is a wasteful number, since it uses less digits than its factorization.

22001211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68348052 (or 68348045 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22001211221100 its reverse (112211210022), we get a palindrome (22113422431122).

The spelling of 22001211221100 in words is "twenty-two trillion, one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".