31442430022121 has 2 divisors, whose sum is σ = 31442430022122. Its totient is φ = 31442430022120.

The previous prime is 31442430022067. The next prime is 31442430022123. The reversal of 31442430022121 is 12122003424413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24352251040000 + 7090178982121 = 4934800^2 + 2662739^2 .

It is a cyclic number.

It is not a de Polignac number, because 31442430022121 - 2²⁶ = 31442362913257 is a prime.

Together with 31442430022123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31442430022123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721215011060 + 15721215011061.

It is an arithmetic number, because the mean of its divisors is an integer number (15721215011061).

Almost surely, 2^{31442430022121} is an apocalyptic number.

It is an amenable number.

31442430022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442430022121 is an equidigital number, since it uses as much as digits as its factorization.

31442430022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31442430022121 its reverse (12122003424413), we get a palindrome (43564433446534).

The spelling of 31442430022121 in words is "thirty-one trillion, four hundred forty-two billion, four hundred thirty million, twenty-two thousand, one hundred twenty-one".