21323302012351 has 2 divisors, whose sum is σ = 21323302012352. Its totient is φ = 21323302012350.

The previous prime is 21323302012307. The next prime is 21323302012357. The reversal of 21323302012351 is 15321020332312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21323302012351 - 2¹⁷ = 21323301881279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323302012357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661651006175 + 10661651006176.

It is an arithmetic number, because the mean of its divisors is an integer number (10661651006176).

Almost surely, 2^{21323302012351} is an apocalyptic number.

21323302012351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323302012351 is an equidigital number, since it uses as much as digits as its factorization.

21323302012351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 21323302012351 its reverse (15321020332312), we get a palindrome (36644322344663).

The spelling of 21323302012351 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred two million, twelve thousand, three hundred fifty-one".