21222015532412 has 48 divisors (see below), whose sum is σ = 37934635132800. Its totient is φ = 10384564407360.

The previous prime is 21222015532409. The next prime is 21222015532469. The reversal of 21222015532412 is 21423551022212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060507487 + ... + 1060527497.

It is an arithmetic number, because the mean of its divisors is an integer number (790304898600).

Almost surely, 2^{21222015532412} is an apocalyptic number.

It is an amenable number.

21222015532412 is a deficient number, since it is larger than the sum of its proper divisors (16712619600388).

21222015532412 is a wasteful number, since it uses less digits than its factorization.

21222015532412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32426 (or 32424 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 21222015532412 its reverse (21423551022212), we get a palindrome (42645566554624).

The spelling of 21222015532412 in words is "twenty-one trillion, two hundred twenty-two billion, fifteen million, five hundred thirty-two thousand, four hundred twelve".