20001222110100 has 144 divisors (see below), whose sum is σ = 72149863113216. Its totient is φ = 4156098096000.

The previous prime is 20001222110083. The next prime is 20001222110213. The reversal of 20001222110100 is 101122210002.

It is a super-4 number, since 4×20001222110100⁴ (a number of 54 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 432903786 + ... + 432949985.

It is an arithmetic number, because the mean of its divisors is an integer number (501040716064).

Almost surely, 2^{20001222110100} is an apocalyptic number.

20001222110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001222110100 is an abundant number, since it is smaller than the sum of its proper divisors (52148641003116).

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

20001222110100 is a wasteful number, since it uses less digits than its factorization.

20001222110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865853806 (or 865853799 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001222110100 its reverse (101122210002), we get a palindrome (20102344320102).

The spelling of 20001222110100 in words is "twenty trillion, one billion, two hundred twenty-two million, one hundred ten thousand, one hundred".