11331123012111 has 16 divisors (see below), whose sum is σ = 17268421597184. Its totient is φ = 6474196772064.

The previous prime is 11331123012109. The next prime is 11331123012179. The reversal of 11331123012111 is 11121032113311.

It is not a de Polignac number, because 11331123012111 - 2¹ = 11331123012109 is a prime.

It is a super-2 number, since 2×11331123012111² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331123012211) 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, 30253756 + ... + 30626001.

It is an arithmetic number, because the mean of its divisors is an integer number (1079276349824).

Almost surely, 2^{11331123012111} is an apocalyptic number.

11331123012111 is a deficient number, since it is larger than the sum of its proper divisors (5937298585073).

11331123012111 is an equidigital number, since it uses as much as digits as its factorization.

11331123012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60888630.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 11331123012111 its reverse (11121032113311), we get a palindrome (22452155125422).

The spelling of 11331123012111 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-three million, twelve thousand, one hundred eleven".