123312012121111 has 6 divisors (see below), whose sum is σ = 135541302579536. Its totient is φ = 112101829200900.

The previous prime is 123312012121097. The next prime is 123312012121121. The reversal of 123312012121111 is 111121210213321.

It is not a de Polignac number, because 123312012121111 - 2¹⁷ = 123312011990039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312012121121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509553768975 + ... + 509553769216.

Almost surely, 2^{123312012121111} is an apocalyptic number.

123312012121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123312012121111 is a deficient number, since it is larger than the sum of its proper divisors (12229290458425).

123312012121111 is a wasteful number, since it uses less digits than its factorization.

123312012121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019107538213 (or 1019107538202 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 123312012121111 its reverse (111121210213321), we get a palindrome (234433222334432).

The spelling of 123312012121111 in words is "one hundred twenty-three trillion, three hundred twelve billion, twelve million, one hundred twenty-one thousand, one hundred eleven".