23121022061 has 2 divisors, whose sum is σ = 23121022062. Its totient is φ = 23121022060.

The previous prime is 23121021997. The next prime is 23121022063. The reversal of 23121022061 is 16022012132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15305401225 + 7815620836 = 123715^2 + 88406^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121022061 - 2⁶ = 23121021997 is a prime.

It is a super-2 number, since 2×23121022061² (a number of 22 digits) contains 22 as substring.

Together with 23121022063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121022063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560511030 + 11560511031.

It is an arithmetic number, because the mean of its divisors is an integer number (11560511031).

Almost surely, 2^23121022061 is an apocalyptic number.

It is an amenable number.

23121022061 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121022061 is an equidigital number, since it uses as much as digits as its factorization.

23121022061 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 23121022061 its reverse (16022012132), we get a palindrome (39143034193).

The spelling of 23121022061 in words is "twenty-three billion, one hundred twenty-one million, twenty-two thousand, sixty-one".