2021102102100 has 72 divisors (see below), whose sum is σ = 5854933295008. Its totient is φ = 538295932800.

The previous prime is 2021102102059. The next prime is 2021102102197. The reversal of 2021102102100 is 12012011202.

It is a super-2 number, since 2×2021102102100² (a number of 25 digits) contains 22 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3910219 + ... + 4396818.

Almost surely, 2^{2021102102100} is an apocalyptic number.

2021102102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021102102100 is an abundant number, since it is smaller than the sum of its proper divisors (3833831192908).

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

2021102102100 is a wasteful number, since it uses less digits than its factorization.

2021102102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8307865 (or 8307858 counting only the distinct ones).

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

Adding to 2021102102100 its reverse (12012011202), we get a palindrome (2033114113302).

The spelling of 2021102102100 in words is "two trillion, twenty-one billion, one hundred two million, one hundred two thousand, one hundred".