2021022221100 has 72 divisors (see below), whose sum is σ = 5854314914448. Its totient is φ = 538310323200.

The previous prime is 2021022221089. The next prime is 2021022221111. The reversal of 2021022221100 is 11222201202.

It is an interprime number because it is at equal distance from previous prime (2021022221089) and next prime (2021022221111).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021022221100.

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, 3673321 + ... + 4187520.

Almost surely, 2^{2021022221100} is an apocalyptic number.

2021022221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021022221100 is an abundant number, since it is smaller than the sum of its proper divisors (3833292693348).

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

2021022221100 is a wasteful number, since it uses less digits than its factorization.

2021022221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861715 (or 7861708 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021022221100 its reverse (11222201202), we get a palindrome (2032244422302).

The spelling of 2021022221100 in words is "two trillion, twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred".