21013300220 has 24 divisors (see below), whose sum is σ = 48139561008. Its totient is φ = 7641200000.

The previous prime is 21013300207. The next prime is 21013300247. The reversal of 21013300220 is 2200331012.

It is a happy number.

It is a super-2 number, since 2×21013300220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21013300195 and 21013300204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47757281 + ... + 47757720.

It is an arithmetic number, because the mean of its divisors is an integer number (2005815042).

Almost surely, 2^21013300220 is an apocalyptic number.

21013300220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013300220 is an abundant number, since it is smaller than the sum of its proper divisors (27126260788).

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

21013300220 is a wasteful number, since it uses less digits than its factorization.

21013300220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95515021 (or 95515019 counting only the distinct ones).

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

Adding to 21013300220 its reverse (2200331012), we get a palindrome (23213631232).

The spelling of 21013300220 in words is "twenty-one billion, thirteen million, three hundred thousand, two hundred twenty".