21223303211312 has 40 divisors (see below), whose sum is σ = 41350925179440. Its totient is φ = 10552099737600.

The previous prime is 21223303211293. The next prime is 21223303211317. The reversal of 21223303211312 is 21311230332212.

It is a super-2 number, since 2×21223303211312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21223303211317) 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, 159266312 + ... + 159399512.

It is an arithmetic number, because the mean of its divisors is an integer number (1033773129486).

Almost surely, 2^{21223303211312} is an apocalyptic number.

It is an amenable number.

21223303211312 is a deficient number, since it is larger than the sum of its proper divisors (20127621968128).

21223303211312 is a wasteful number, since it uses less digits than its factorization.

21223303211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189021 (or 189015 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21223303211312 its reverse (21311230332212), we get a palindrome (42534533543524).

The spelling of 21223303211312 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred three million, two hundred eleven thousand, three hundred twelve".