23121331061 has 2 divisors, whose sum is σ = 23121331062. Its totient is φ = 23121331060.

The previous prime is 23121331001. The next prime is 23121331073. The reversal of 23121331061 is 16013312132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22551028900 + 570302161 = 150170^2 + 23881^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121331061 - 2¹⁸ = 23121068917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121331001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560665530 + 11560665531.

It is an arithmetic number, because the mean of its divisors is an integer number (11560665531).

Almost surely, 2^23121331061 is an apocalyptic number.

It is an amenable number.

23121331061 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121331061 is an equidigital number, since it uses as much as digits as its factorization.

23121331061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 23121331061 its reverse (16013312132), we get a palindrome (39134643193).

The spelling of 23121331061 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, sixty-one".