21322231351 has 16 divisors (see below), whose sum is σ = 24194787264. Its totient is φ = 18676652544.

The previous prime is 21322231297. The next prime is 21322231363. The reversal of 21322231351 is 15313222312.

It is a cyclic number.

It is not a de Polignac number, because 21322231351 - 2¹³ = 21322223159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322231451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722460 + ... + 751393.

It is an arithmetic number, because the mean of its divisors is an integer number (1512174204).

Almost surely, 2^21322231351 is an apocalyptic number.

21322231351 is a deficient number, since it is larger than the sum of its proper divisors (2872555913).

21322231351 is a wasteful number, since it uses less digits than its factorization.

21322231351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473930.

The product of its digits is 2160, while the sum is 25.

Adding to 21322231351 its reverse (15313222312), we get a palindrome (36635453663).

The spelling of 21322231351 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, three hundred fifty-one".