125000253221 has 2 divisors, whose sum is σ = 125000253222. Its totient is φ = 125000253220.

The previous prime is 125000253199. The next prime is 125000253239. The reversal of 125000253221 is 122352000521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71990256100 + 53009997121 = 268310^2 + 230239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125000253221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125000223221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500126610 + 62500126611.

It is an arithmetic number, because the mean of its divisors is an integer number (62500126611).

Almost surely, 2^125000253221 is an apocalyptic number.

It is an amenable number.

125000253221 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000253221 is an equidigital number, since it uses as much as digits as its factorization.

125000253221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 125000253221 its reverse (122352000521), we get a palindrome (247352253742).

The spelling of 125000253221 in words is "one hundred twenty-five billion, two hundred fifty-three thousand, two hundred twenty-one".