2021121200100 has 72 divisors (see below), whose sum is σ = 6005825408128. Its totient is φ = 524399011200.

The previous prime is 2021121200081. The next prime is 2021121200129. The reversal of 2021121200100 is 10021211202.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91030396 + ... + 91052595.

Almost surely, 2^{2021121200100} is an apocalyptic number.

2021121200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021121200100 is an abundant number, since it is smaller than the sum of its proper divisors (3984704208028).

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

2021121200100 is a wasteful number, since it uses less digits than its factorization.

2021121200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182083045 (or 182083038 counting only the distinct ones).

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

Adding to 2021121200100 its reverse (10021211202), we get a palindrome (2031142411302).

It can be divided in two parts, 2021 and 121200100, that added together give a palindrome (121202121).

The spelling of 2021121200100 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred thousand, one hundred".