21312230411 has 2 divisors, whose sum is σ = 21312230412. Its totient is φ = 21312230410.

The previous prime is 21312230351. The next prime is 21312230419. The reversal of 21312230411 is 11403221312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21312230411 - 2³⁰ = 20238488587 is a prime.

It is a super-2 number, since 2×21312230411² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21312230419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656115205 + 10656115206.

It is an arithmetic number, because the mean of its divisors is an integer number (10656115206).

Almost surely, 2^21312230411 is an apocalyptic number.

21312230411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312230411 is an equidigital number, since it uses as much as digits as its factorization.

21312230411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21312230411 its reverse (11403221312), we get a palindrome (32715451723).

Subtracting from 21312230411 its reverse (11403221312), we obtain a palindrome (9909009099).

The spelling of 21312230411 in words is "twenty-one billion, three hundred twelve million, two hundred thirty thousand, four hundred eleven".