126176427221 has 8 divisors (see below), whose sum is σ = 135885244824. Its totient is φ = 116468029440.

The previous prime is 126176427217. The next prime is 126176427241. The reversal of 126176427221 is 122724671621.

It can be written as a sum of positive squares in 4 ways, for example, as 2283121 + 126174144100 = 1511^2 + 355210^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 126176427221 - 2² = 126176427217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126176427211) 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, 823541 + ... + 964661.

It is an arithmetic number, because the mean of its divisors is an integer number (16985655603).

Almost surely, 2^126176427221 is an apocalyptic number.

It is an amenable number.

126176427221 is a deficient number, since it is larger than the sum of its proper divisors (9708817603).

126176427221 is a wasteful number, since it uses less digits than its factorization.

126176427221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209911.

The product of its digits is 112896, while the sum is 41.

The spelling of 126176427221 in words is "one hundred twenty-six billion, one hundred seventy-six million, four hundred twenty-seven thousand, two hundred twenty-one".