21222021023112 has 64 divisors (see below), whose sum is σ = 65298526231680. Its totient is φ = 5597016532992.

The previous prime is 21222021023101. The next prime is 21222021023117. The reversal of 21222021023112 is 21132012022212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21222021023117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4858519113 + ... + 4858523480.

It is an arithmetic number, because the mean of its divisors is an integer number (1020289472370).

Almost surely, 2^{21222021023112} is an apocalyptic number.

It is an amenable number.

21222021023112 is an abundant number, since it is smaller than the sum of its proper divisors (44076505208568).

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

21222021023112 is a wasteful number, since it uses less digits than its factorization.

21222021023112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717042622 (or 9717042618 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21222021023112 its reverse (21132012022212), we get a palindrome (42354033045324).

The spelling of 21222021023112 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-three thousand, one hundred twelve".