21423004211312 has 20 divisors (see below), whose sum is σ = 45280440719736. Its totient is φ = 9737729186880.

The previous prime is 21423004211269. The next prime is 21423004211363. The reversal of 21423004211312 is 21311240032412.

It is a happy number.

It is a super-2 number, since 2×21423004211312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60860807243 + ... + 60860807594.

Almost surely, 2^{21423004211312} is an apocalyptic number.

21423004211312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21423004211312 is an abundant number, since it is smaller than the sum of its proper divisors (23857436508424).

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

21423004211312 is a wasteful number, since it uses less digits than its factorization.

21423004211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121721614856 (or 121721614850 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21423004211312 its reverse (21311240032412), we get a palindrome (42734244243724).

The spelling of 21423004211312 in words is "twenty-one trillion, four hundred twenty-three billion, four million, two hundred eleven thousand, three hundred twelve".