21122030300 has 144 divisors (see below), whose sum is σ = 53807889408. Its totient is φ = 7046611200.

The previous prime is 21122030291. The next prime is 21122030323. The reversal of 21122030300 is 303022112.

It is a happy number.

It is a super-2 number, since 2×21122030300² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5953127 + ... + 5956673.

Almost surely, 2^21122030300 is an apocalyptic number.

21122030300 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 21122030300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26903944704).

21122030300 is an abundant number, since it is smaller than the sum of its proper divisors (32685859108).

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

21122030300 is a wasteful number, since it uses less digits than its factorization.

21122030300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21122030300 its reverse (303022112), we get a palindrome (21425052412).

The spelling of 21122030300 in words is "twenty-one billion, one hundred twenty-two million, thirty thousand, three hundred".