1111866911401 has 9 divisors (see below), whose sum is σ = 1116580097559. Its totient is φ = 1107173550000.

The previous prime is 1111866911383. The next prime is 1111866911411. The reversal of 1111866911401 is 1041196681111.

The square root of 1111866911401 is 1054451.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63127065001 + 1048739846400 = 251251^2 + 1024080^2 .

It is not a de Polignac number, because 1111866911401 - 2²⁵ = 1111833356969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111866911411) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 264665101 + ... + 264669301.

Almost surely, 2^{1111866911401} is an apocalyptic number.

1111866911401 is the 1054451-st square number.

1111866911401 is the 527226-th centered octagonal number.

It is an amenable number.

1111866911401 is a deficient number, since it is larger than the sum of its proper divisors (4713186158).

1111866911401 is an frugal number, since it uses more digits than its factorization.

1111866911401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8904 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 1111866911401 in words is "one trillion, one hundred eleven billion, eight hundred sixty-six million, nine hundred eleven thousand, four hundred one".