21030122210100 has 72 divisors (see below), whose sum is σ = 61083913171008. Its totient is φ = 5586211430400.

The previous prime is 21030122210081. The next prime is 21030122210117. The reversal of 21030122210100 is 101222103012.

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 21030122210100.

It is a congruent number.

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, 136305016 + ... + 136459215.

Almost surely, 2^{21030122210100} is an apocalyptic number.

21030122210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030122210100 is an abundant number, since it is smaller than the sum of its proper divisors (40053790960908).

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

21030122210100 is a wasteful number, since it uses less digits than its factorization.

21030122210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272764505 (or 272764498 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21030122210100 its reverse (101222103012), we get a palindrome (21131344313112).

The spelling of 21030122210100 in words is "twenty-one trillion, thirty billion, one hundred twenty-two million, two hundred ten thousand, one hundred".