21020303112 has 32 divisors (see below), whose sum is σ = 53183904480. Its totient is φ = 6922348160.

The previous prime is 21020303111. The next prime is 21020303149. The reversal of 21020303112 is 21130302012.

It is a junction number, because it is equal to n+sod(n) for n = 21020303091 and 21020303100.

It is not an unprimeable number, because it can be changed into a prime (21020303111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5274189 + ... + 5278172.

It is an arithmetic number, because the mean of its divisors is an integer number (1661997015).

Almost surely, 2^21020303112 is an apocalyptic number.

It is an amenable number.

21020303112 is an abundant number, since it is smaller than the sum of its proper divisors (32163601368).

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

21020303112 is a wasteful number, since it uses less digits than its factorization.

21020303112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10552453 (or 10552449 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21020303112 its reverse (21130302012), we get a palindrome (42150605124).

The spelling of 21020303112 in words is "twenty-one billion, twenty million, three hundred three thousand, one hundred twelve".