1266421227238 has 16 divisors (see below), whose sum is σ = 2002318344000. Its totient is φ = 599071975272.

The previous prime is 1266421227191. The next prime is 1266421227241. The reversal of 1266421227238 is 8327221246621.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22520548 + ... + 22576711.

It is an arithmetic number, because the mean of its divisors is an integer number (125144896500).

Almost surely, 2^{1266421227238} is an apocalyptic number.

1266421227238 is a deficient number, since it is larger than the sum of its proper divisors (735897116762).

1266421227238 is a wasteful number, since it uses less digits than its factorization.

1266421227238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45098019.

The product of its digits is 774144, while the sum is 46.

The spelling of 1266421227238 in words is "one trillion, two hundred sixty-six billion, four hundred twenty-one million, two hundred twenty-seven thousand, two hundred thirty-eight".