1221212123023 has 2 divisors, whose sum is σ = 1221212123024. Its totient is φ = 1221212123022.

The previous prime is 1221212123011. The next prime is 1221212123041. The reversal of 1221212123023 is 3203212121221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221212123023 - 2³³ = 1212622188431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221212122985 and 1221212123003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221212123083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610606061511 + 610606061512.

It is an arithmetic number, because the mean of its divisors is an integer number (610606061512).

Almost surely, 2^{1221212123023} is an apocalyptic number.

1221212123023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221212123023 is an equidigital number, since it uses as much as digits as its factorization.

1221212123023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1221212123023 its reverse (3203212121221), we get a palindrome (4424424244244).

The spelling of 1221212123023 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-three thousand, twenty-three".