11801800111 has 8 divisors (see below), whose sum is σ = 11827920384. Its totient is φ = 11775705240.

The previous prime is 11801800097. The next prime is 11801800133. The reversal of 11801800111 is 11100810811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11801800111 - 2⁷ = 11801799983 is a prime.

It is a super-2 number, since 2×11801800111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801800151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143906 + ... + 1154176.

It is an arithmetic number, because the mean of its divisors is an integer number (1478490048).

Almost surely, 2^11801800111 is an apocalyptic number.

11801800111 is a deficient number, since it is larger than the sum of its proper divisors (26120273).

11801800111 is a wasteful number, since it uses less digits than its factorization.

11801800111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701.

The product of its (nonzero) digits is 64, while the sum is 22.

The spelling of 11801800111 in words is "eleven billion, eight hundred one million, eight hundred thousand, one hundred eleven".