2021202210100 has 72 divisors (see below), whose sum is σ = 4417403045888. Its totient is φ = 802699632000.

The previous prime is 2021202210089. The next prime is 2021202210113. The reversal of 2021202210100 is 10122021202.

It is a happy number.

It is a super-2 number, since 2×2021202210100² (a number of 25 digits) contains 22 as substring.

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, 29153677 + ... + 29222923.

Almost surely, 2^{2021202210100} is an apocalyptic number.

2021202210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021202210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2208701522944).

2021202210100 is an abundant number, since it is smaller than the sum of its proper divisors (2396200835788).

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

2021202210100 is a wasteful number, since it uses less digits than its factorization.

2021202210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71345 (or 71338 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021202210100 its reverse (10122021202), we get a palindrome (2031324231302).

The spelling of 2021202210100 in words is "two trillion, twenty-one billion, two hundred two million, two hundred ten thousand, one hundred".