125221331 has 2 divisors, whose sum is σ = 125221332. Its totient is φ = 125221330.

The previous prime is 125221297. The next prime is 125221387. The reversal of 125221331 is 133122521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125221331 is a prime.

It is a super-2 number, since 2×125221331² = 31360763474823122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62610665 + 62610666.

It is an arithmetic number, because the mean of its divisors is an integer number (62610666).

Almost surely, 2^125221331 is an apocalyptic number.

125221331 is a deficient number, since it is larger than the sum of its proper divisors (1).

125221331 is an equidigital number, since it uses as much as digits as its factorization.

125221331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 125221331 is about 11190.2337330370. The cubic root of 125221331 is about 500.2949339937.

Adding to 125221331 its reverse (133122521), we get a palindrome (258343852).

The spelling of 125221331 in words is "one hundred twenty-five million, two hundred twenty-one thousand, three hundred thirty-one".