126361475221 has 32 divisors (see below), whose sum is σ = 140135184000. Its totient is φ = 113458044672.

The previous prime is 126361475213. The next prime is 126361475243. The reversal of 126361475221 is 122574163621.

It is not a de Polignac number, because 126361475221 - 2³ = 126361475213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126361475291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25907235 + ... + 25912111.

It is an arithmetic number, because the mean of its divisors is an integer number (4379224500).

Almost surely, 2^126361475221 is an apocalyptic number.

It is an amenable number.

126361475221 is a deficient number, since it is larger than the sum of its proper divisors (13773708779).

126361475221 is a wasteful number, since it uses less digits than its factorization.

126361475221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5781.

The product of its digits is 120960, while the sum is 40.

The spelling of 126361475221 in words is "one hundred twenty-six billion, three hundred sixty-one million, four hundred seventy-five thousand, two hundred twenty-one".