12012101123 has 24 divisors (see below), whose sum is σ = 13762065408. Its totient is φ = 10464894000.

The previous prime is 12012101113. The next prime is 12012101197. The reversal of 12012101123 is 32110121021.

It is not a de Polignac number, because 12012101123 - 2¹⁴ = 12012084739 is a prime.

It is a super-2 number, since 2×12012101123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012101098 and 12012101107.

It is not an unprimeable number, because it can be changed into a prime (12012101113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370808 + ... + 401898.

It is an arithmetic number, because the mean of its divisors is an integer number (573419392).

Almost surely, 2^12012101123 is an apocalyptic number.

12012101123 is a deficient number, since it is larger than the sum of its proper divisors (1749964285).

12012101123 is a wasteful number, since it uses less digits than its factorization.

12012101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31247 (or 31236 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12012101123 its reverse (32110121021), we get a palindrome (44122222144).

The spelling of 12012101123 in words is "twelve billion, twelve million, one hundred one thousand, one hundred twenty-three".