125310221929 has 2 divisors, whose sum is σ = 125310221930. Its totient is φ = 125310221928.

The previous prime is 125310221917. The next prime is 125310221951. The reversal of 125310221929 is 929122013521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89088519529 + 36221702400 = 298477^2 + 190320^2 .

It is a cyclic number.

It is not a de Polignac number, because 125310221929 - 2⁷ = 125310221801 is a prime.

It is not a weakly prime, because it can be changed into another prime (125310221999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62655110964 + 62655110965.

It is an arithmetic number, because the mean of its divisors is an integer number (62655110965).

Almost surely, 2^125310221929 is an apocalyptic number.

It is an amenable number.

125310221929 is a deficient number, since it is larger than the sum of its proper divisors (1).

125310221929 is an equidigital number, since it uses as much as digits as its factorization.

125310221929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 125310221929 in words is "one hundred twenty-five billion, three hundred ten million, two hundred twenty-one thousand, nine hundred twenty-nine".