21323301051 has 48 divisors (see below), whose sum is σ = 31909109760. Its totient is φ = 12646932480.

The previous prime is 21323301031. The next prime is 21323301053. The reversal of 21323301051 is 15010332312.

It is not a de Polignac number, because 21323301051 - 2¹⁰ = 21323300027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323301053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4036630 + ... + 4041908.

It is an arithmetic number, because the mean of its divisors is an integer number (664773120).

Almost surely, 2^21323301051 is an apocalyptic number.

21323301051 is a deficient number, since it is larger than the sum of its proper divisors (10585808709).

21323301051 is a wasteful number, since it uses less digits than its factorization.

21323301051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5596 (or 5583 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21323301051 its reverse (15010332312), we get a palindrome (36333633363).

The spelling of 21323301051 in words is "twenty-one billion, three hundred twenty-three million, three hundred one thousand, fifty-one".