125220010109 has 2 divisors, whose sum is σ = 125220010110. Its totient is φ = 125220010108.

The previous prime is 125220010103. The next prime is 125220010121. The reversal of 125220010109 is 901010022521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63506520025 + 61713490084 = 252005^2 + 248422^2 .

It is a cyclic number.

It is not a de Polignac number, because 125220010109 - 2³⁶ = 56500533373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125220010103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62610005054 + 62610005055.

It is an arithmetic number, because the mean of its divisors is an integer number (62610005055).

Almost surely, 2^125220010109 is an apocalyptic number.

It is an amenable number.

125220010109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125220010109 is an equidigital number, since it uses as much as digits as its factorization.

125220010109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 125220010109 in words is "one hundred twenty-five billion, two hundred twenty million, ten thousand, one hundred nine".