125017221043 has 32 divisors (see below), whose sum is σ = 156211034112. Its totient is φ = 98295206400.

The previous prime is 125017221013. The next prime is 125017221047. The reversal of 125017221043 is 340122710521.

It is a cyclic number.

It is not a de Polignac number, because 125017221043 - 2¹⁷ = 125017089971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125017221047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426808 + ... + 657418.

It is an arithmetic number, because the mean of its divisors is an integer number (4881594816).

Almost surely, 2^125017221043 is an apocalyptic number.

125017221043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125017221043 is a deficient number, since it is larger than the sum of its proper divisors (31193813069).

125017221043 is a wasteful number, since it uses less digits than its factorization.

125017221043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230875.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 125017221043 its reverse (340122710521), we get a palindrome (465139931564).

It can be divided in two parts, 1250172 and 21043, that added together give a triangular number (1271215 = T₁₅₉₄).

The spelling of 125017221043 in words is "one hundred twenty-five billion, seventeen million, two hundred twenty-one thousand, forty-three".