23121744949 has 2 divisors, whose sum is σ = 23121744950. Its totient is φ = 23121744948.

The previous prime is 23121744941. The next prime is 23121745013. The reversal of 23121744949 is 94944712132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21318044049 + 1803700900 = 146007^2 + 42470^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121744949 - 2³ = 23121744941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23121744899 and 23121744908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121744941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560872474 + 11560872475.

It is an arithmetic number, because the mean of its divisors is an integer number (11560872475).

Almost surely, 2^23121744949 is an apocalyptic number.

It is an amenable number.

23121744949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121744949 is an equidigital number, since it uses as much as digits as its factorization.

23121744949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The spelling of 23121744949 in words is "twenty-three billion, one hundred twenty-one million, seven hundred forty-four thousand, nine hundred forty-nine".