12002021123 has 2 divisors, whose sum is σ = 12002021124. Its totient is φ = 12002021122.

The previous prime is 12002021117. The next prime is 12002021149. The reversal of 12002021123 is 32112020021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12002021123 - 2⁴ = 12002021107 is a prime.

It is a super-2 number, since 2×12002021123² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002021098 and 12002021107.

It is not a weakly prime, because it can be changed into another prime (12002021173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001010561 + 6001010562.

It is an arithmetic number, because the mean of its divisors is an integer number (6001010562).

Almost surely, 2^12002021123 is an apocalyptic number.

12002021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002021123 is an equidigital number, since it uses as much as digits as its factorization.

12002021123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12002021123 its reverse (32112020021), we get a palindrome (44114041144).

The spelling of 12002021123 in words is "twelve billion, two million, twenty-one thousand, one hundred twenty-three".