20012122210100 has 18 divisors (see below), whose sum is σ = 43426305196134. Its totient is φ = 8004848884000.

The previous prime is 20012122210063. The next prime is 20012122210127. The reversal of 20012122210100 is 101222121002.

It can be written as a sum of positive squares in 3 ways, for example, as 1215978165796 + 18796144044304 = 1102714^2 + 4335452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100060610951 + ... + 100060611150.

Almost surely, 2^{20012122210100} is an apocalyptic number.

20012122210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012122210100 is an abundant number, since it is smaller than the sum of its proper divisors (23414182986034).

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

20012122210100 is a wasteful number, since it uses less digits than its factorization.

20012122210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200121222115 (or 200121222108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012122210100 its reverse (101222121002), we get a palindrome (20113344331102).

The spelling of 20012122210100 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred ten thousand, one hundred".