11666111151121 has 16 divisors (see below), whose sum is σ = 14123810661760. Its totient is φ = 9412894033920.

The previous prime is 11666111151067. The next prime is 11666111151127. The reversal of 11666111151121 is 12115111166611.

It is a cyclic number.

It is not a de Polignac number, because 11666111151121 - 2¹⁵ = 11666111118353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11666111151127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279326640 + ... + 279368401.

It is an arithmetic number, because the mean of its divisors is an integer number (882738166360).

Almost surely, 2^{11666111151121} is an apocalyptic number.

It is an amenable number.

11666111151121 is a deficient number, since it is larger than the sum of its proper divisors (2457699510639).

11666111151121 is a wasteful number, since it uses less digits than its factorization.

11666111151121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558695224.

The product of its digits is 2160, while the sum is 34.

The spelling of 11666111151121 in words is "eleven trillion, six hundred sixty-six billion, one hundred eleven million, one hundred fifty-one thousand, one hundred twenty-one".