100001121212020 has 96 divisors (see below), whose sum is σ = 243947403866880. Its totient is φ = 33722615485440.

The previous prime is 100001121212017. The next prime is 100001121212101. The reversal of 100001121212020 is 20212121100001.

It is a super-2 number, since 2×100001121212020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214095091 + ... + 214561669.

It is an arithmetic number, because the mean of its divisors is an integer number (2541118790280).

Almost surely, 2^{100001121212020} is an apocalyptic number.

100001121212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001121212020 is an abundant number, since it is smaller than the sum of its proper divisors (143946282654860).

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

100001121212020 is a wasteful number, since it uses less digits than its factorization.

100001121212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491753 (or 491751 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100001121212020 its reverse (20212121100001), we get a palindrome (120213242312021).

The spelling of 100001121212020 in words is "one hundred trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, twenty".