21312122333286 has 16 divisors (see below), whose sum is σ = 42693104520000. Its totient is φ = 7092564135528.

The previous prime is 21312122333269. The next prime is 21312122333287. The reversal of 21312122333286 is 68233322121312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312122333287) 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, 2869156536 + ... + 2869163963.

It is an arithmetic number, because the mean of its divisors is an integer number (2668319032500).

Almost surely, 2^{21312122333286} is an apocalyptic number.

21312122333286 is an abundant number, since it is smaller than the sum of its proper divisors (21380982186714).

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

21312122333286 is a wasteful number, since it uses less digits than its factorization.

21312122333286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738321123.

The product of its digits is 124416, while the sum is 39.

Adding to 21312122333286 its reverse (68233322121312), we get a palindrome (89545444454598).

The spelling of 21312122333286 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty-two million, three hundred thirty-three thousand, two hundred eighty-six".