125135005213 has 4 divisors (see below), whose sum is σ = 125152161340.
Its totient is φ = 125117849088.
The previous prime is 125135005211. The next prime is 125135005291. The reversal of 125135005213 is 312500531521.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 29652151204 + 95482854009 = 172198^2 + 309003^2
It is a cyclic number.
It is not a de Polignac number, because 125135005213 - 21 = 125135005211 is a prime.
It is a super-3 number, since 3×1251350052133 (a number of 34 digits) contains 333 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (125135005211) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8567118 + ... + 8581711.
It is an arithmetic number, because the mean of its divisors is an integer number (31288040335).
Almost surely, 2125135005213 is an apocalyptic number.
It is an amenable number.
125135005213 is a deficient number, since it is larger than the sum of its proper divisors (17156127).
125135005213 is an equidigital number, since it uses as much as digits as its factorization.
125135005213 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 17156126.
The product of its (nonzero) digits is 4500, while the sum is 28.
The spelling of 125135005213 in words is "one hundred twenty-five billion, one hundred thirty-five million, five thousand, two hundred thirteen".