23012102821 has 2 divisors, whose sum is σ = 23012102822. Its totient is φ = 23012102820.

The previous prime is 23012102809. The next prime is 23012102831. The reversal of 23012102821 is 12820121032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20533457025 + 2478645796 = 143295^2 + 49786^2 .

It is a cyclic number.

It is not a de Polignac number, because 23012102821 - 2²³ = 23003714213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23012102792 and 23012102801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23012102801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11506051410 + 11506051411.

It is an arithmetic number, because the mean of its divisors is an integer number (11506051411).

Almost surely, 2^23012102821 is an apocalyptic number.

It is an amenable number.

23012102821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23012102821 is an equidigital number, since it uses as much as digits as its factorization.

23012102821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 23012102821 its reverse (12820121032), we get a palindrome (35832223853).

The spelling of 23012102821 in words is "twenty-three billion, twelve million, one hundred two thousand, eight hundred twenty-one".