1266122412040 has 64 divisors (see below), whose sum is σ = 2933071994160. Its totient is φ = 491588321280.

The previous prime is 1266122411927. The next prime is 1266122412173. The reversal of 1266122412040 is 402142216621.

It can be written as a sum of positive squares in 8 ways, for example, as 757550899876 + 508571512164 = 870374^2 + 713142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1266122411993 and 1266122412011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636377 + ... + 2282536.

Almost surely, 2^{1266122412040} is an apocalyptic number.

1266122412040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266122412040 is an abundant number, since it is smaller than the sum of its proper divisors (1666949582120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266122412040 is a wasteful number, since it uses less digits than its factorization.

1266122412040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919162 (or 3919158 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 1266122412040 its reverse (402142216621), we get a palindrome (1668264628661).

The spelling of 1266122412040 in words is "one trillion, two hundred sixty-six billion, one hundred twenty-two million, four hundred twelve thousand, forty".