21142220300 has 18 divisors (see below), whose sum is σ = 45878618268. Its totient is φ = 8456888080.

The previous prime is 21142220279. The next prime is 21142220339. The reversal of 21142220300 is 302224112.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105711002 + ... + 105711201.

It is an arithmetic number, because the mean of its divisors is an integer number (2548812126).

Almost surely, 2^21142220300 is an apocalyptic number.

21142220300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142220300 is an abundant number, since it is smaller than the sum of its proper divisors (24736397968).

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

21142220300 is a wasteful number, since it uses less digits than its factorization.

21142220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211422217 (or 211422210 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21142220300 its reverse (302224112), we get a palindrome (21444444412).

The spelling of 21142220300 in words is "twenty-one billion, one hundred forty-two million, two hundred twenty thousand, three hundred".