31425300121 has 2 divisors, whose sum is σ = 31425300122. Its totient is φ = 31425300120.

The previous prime is 31425300083. The next prime is 31425300167. The reversal of 31425300121 is 12100352413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18479411721 + 12945888400 = 135939^2 + 113780^2 .

It is a cyclic number.

It is not a de Polignac number, because 31425300121 - 2²⁵ = 31391745689 is a prime.

It is a super-2 number, since 2×31425300121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31425300092 and 31425300101.

It is not a weakly prime, because it can be changed into another prime (31425304121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712650060 + 15712650061.

It is an arithmetic number, because the mean of its divisors is an integer number (15712650061).

Almost surely, 2^31425300121 is an apocalyptic number.

It is an amenable number.

31425300121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425300121 is an equidigital number, since it uses as much as digits as its factorization.

31425300121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 31425300121 its reverse (12100352413), we get a palindrome (43525652534).

The spelling of 31425300121 in words is "thirty-one billion, four hundred twenty-five million, three hundred thousand, one hundred twenty-one".