21010232351 has 2 divisors, whose sum is σ = 21010232352. Its totient is φ = 21010232350.

The previous prime is 21010232317. The next prime is 21010232363. The reversal of 21010232351 is 15323201012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010232351 - 2²² = 21006038047 is a prime.

It is a super-3 number, since 3×21010232351³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010232381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505116175 + 10505116176.

It is an arithmetic number, because the mean of its divisors is an integer number (10505116176).

Almost surely, 2^21010232351 is an apocalyptic number.

21010232351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010232351 is an equidigital number, since it uses as much as digits as its factorization.

21010232351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21010232351 its reverse (15323201012), we get a palindrome (36333433363).

The spelling of 21010232351 in words is "twenty-one billion, ten million, two hundred thirty-two thousand, three hundred fifty-one".