125540221370 has 8 divisors (see below), whose sum is σ = 225972398484. Its totient is φ = 50216088544.

The previous prime is 125540221361. The next prime is 125540221381. The reversal of 125540221370 is 73122045521.

It can be written as a sum of positive squares in 2 ways, for example, as 108242974009 + 17297247361 = 329003^2 + 131519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6277011059 + ... + 6277011078.

Almost surely, 2^125540221370 is an apocalyptic number.

125540221370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125540221370 is a deficient number, since it is larger than the sum of its proper divisors (100432177114).

125540221370 is a wasteful number, since it uses less digits than its factorization.

125540221370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554022144.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 125540221370 its reverse (73122045521), we get a palindrome (198662266891).

The spelling of 125540221370 in words is "one hundred twenty-five billion, five hundred forty million, two hundred twenty-one thousand, three hundred seventy".