125220451611 has 4 divisors (see below), whose sum is σ = 166960602152. Its totient is φ = 83480301072.

The previous prime is 125220451597. The next prime is 125220451633. The reversal of 125220451611 is 116154022521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125220451611 - 2⁷ = 125220451483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125220451651) 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, 20870075266 + ... + 20870075271.

It is an arithmetic number, because the mean of its divisors is an integer number (41740150538).

Almost surely, 2^125220451611 is an apocalyptic number.

125220451611 is a deficient number, since it is larger than the sum of its proper divisors (41740150541).

125220451611 is an equidigital number, since it uses as much as digits as its factorization.

125220451611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41740150540.

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 125220451611 in words is "one hundred twenty-five billion, two hundred twenty million, four hundred fifty-one thousand, six hundred eleven".