12010021123 has 4 divisors (see below), whose sum is σ = 12010286728. Its totient is φ = 12009755520.

The previous prime is 12010021043. The next prime is 12010021151. The reversal of 12010021123 is 32112001021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112001021 = 34403 ⋅933407.

It is a cyclic number.

It is not a de Polignac number, because 12010021123 - 2²¹ = 12007923971 is a prime.

It is a super-2 number, since 2×12010021123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12010021183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46113 + ... + 161698.

It is an arithmetic number, because the mean of its divisors is an integer number (3002571682).

Almost surely, 2^12010021123 is an apocalyptic number.

12010021123 is a deficient number, since it is larger than the sum of its proper divisors (265605).

12010021123 is an equidigital number, since it uses as much as digits as its factorization.

12010021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265604.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12010021123 its reverse (32112001021), we get a palindrome (44122022144).

The spelling of 12010021123 in words is "twelve billion, ten million, twenty-one thousand, one hundred twenty-three".