125106221540 has 24 divisors (see below), whose sum is σ = 263194763832. Its totient is φ = 49952641280.

The previous prime is 125106221521. The next prime is 125106221543. The reversal of 125106221540 is 45122601521.

It can be written as a sum of positive squares in 4 ways, for example, as 11104101376 + 114002120164 = 105376^2 + 337642^2 .

It is not an unprimeable number, because it can be changed into a prime (125106221543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5604041 + ... + 5626320.

It is an arithmetic number, because the mean of its divisors is an integer number (10966448493).

Almost surely, 2^125106221540 is an apocalyptic number.

125106221540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125106221540 is an abundant number, since it is smaller than the sum of its proper divisors (138088542292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125106221540 is a wasteful number, since it uses less digits than its factorization.

125106221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230927 (or 11230925 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 125106221540 in words is "one hundred twenty-five billion, one hundred six million, two hundred twenty-one thousand, five hundred forty".