1212312310123 has 2 divisors, whose sum is σ = 1212312310124. Its totient is φ = 1212312310122.

The previous prime is 1212312310087. The next prime is 1212312310147. The reversal of 1212312310123 is 3210132132121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212312310123 - 2¹³ = 1212312301931 is a prime.

It is a super-2 number, since 2×1212312310123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212312310094 and 1212312310103.

It is not a weakly prime, because it can be changed into another prime (1212312310523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606156155061 + 606156155062.

It is an arithmetic number, because the mean of its divisors is an integer number (606156155062).

Almost surely, 2^{1212312310123} is an apocalyptic number.

1212312310123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212312310123 is an equidigital number, since it uses as much as digits as its factorization.

1212312310123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1212312310123 its reverse (3210132132121), we get a palindrome (4422444442244).

The spelling of 1212312310123 in words is "one trillion, two hundred twelve billion, three hundred twelve million, three hundred ten thousand, one hundred twenty-three".