23011027421 has 2 divisors, whose sum is σ = 23011027422. Its totient is φ = 23011027420.

The previous prime is 23011027397. The next prime is 23011027423. The reversal of 23011027421 is 12472011032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16045288900 + 6965738521 = 126670^2 + 83461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23011027421 is a prime.

It is a super-3 number, since 3×23011027421³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 23011027423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23011027423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11505513710 + 11505513711.

It is an arithmetic number, because the mean of its divisors is an integer number (11505513711).

Almost surely, 2^23011027421 is an apocalyptic number.

It is an amenable number.

23011027421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23011027421 is an equidigital number, since it uses as much as digits as its factorization.

23011027421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 23011027421 its reverse (12472011032), we get a palindrome (35483038453).

The spelling of 23011027421 in words is "twenty-three billion, eleven million, twenty-seven thousand, four hundred twenty-one".