12021001331123 has 2 divisors, whose sum is σ = 12021001331124. Its totient is φ = 12021001331122.

The previous prime is 12021001331117. The next prime is 12021001331161. The reversal of 12021001331123 is 32113310012021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12021001331123 - 2¹⁰ = 12021001330099 is a prime.

It is a super-2 number, since 2×12021001331123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12021001331095 and 12021001331104.

It is not a weakly prime, because it can be changed into another prime (12021001301123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010500665561 + 6010500665562.

It is an arithmetic number, because the mean of its divisors is an integer number (6010500665562).

Almost surely, 2^{12021001331123} is an apocalyptic number.

12021001331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021001331123 is an equidigital number, since it uses as much as digits as its factorization.

12021001331123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12021001331123 its reverse (32113310012021), we get a palindrome (44134311343144).

The spelling of 12021001331123 in words is "twelve trillion, twenty-one billion, one million, three hundred thirty-one thousand, one hundred twenty-three".