2021022010100 has 144 divisors (see below), whose sum is σ = 4500875258880. Its totient is φ = 787342550400.

The previous prime is 2021022010069. The next prime is 2021022010103. The reversal of 2021022010100 is 10102201202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021022010103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1017121307 + ... + 1017123293.

Almost surely, 2^{2021022010100} is an apocalyptic number.

2021022010100 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 2021022010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2250437629440).

2021022010100 is an abundant number, since it is smaller than the sum of its proper divisors (2479853248780).

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

2021022010100 is a wasteful number, since it uses less digits than its factorization.

2021022010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021022010100 its reverse (10102201202), we get a palindrome (2031124211302).

The spelling of 2021022010100 in words is "two trillion, twenty-one billion, twenty-two million, ten thousand, one hundred".