126871807221 has 32 divisors (see below), whose sum is σ = 190810339200. Its totient is φ = 83298378240.

The previous prime is 126871807219. The next prime is 126871807247. The reversal of 126871807221 is 122708178621.

It is not a de Polignac number, because 126871807221 - 2¹ = 126871807219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126871807201) 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, 12044485 + ... + 12055013.

It is an arithmetic number, because the mean of its divisors is an integer number (5962823100).

Almost surely, 2^126871807221 is an apocalyptic number.

It is an amenable number.

126871807221 is a deficient number, since it is larger than the sum of its proper divisors (63938531979).

126871807221 is a wasteful number, since it uses less digits than its factorization.

126871807221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17266 (or 17260 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 126871807221 in words is "one hundred twenty-six billion, eight hundred seventy-one million, eight hundred seven thousand, two hundred twenty-one".