121221323011123 has 2 divisors, whose sum is σ = 121221323011124. Its totient is φ = 121221323011122.

The previous prime is 121221323011069. The next prime is 121221323011127. The reversal of 121221323011123 is 321110323122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221323011123 - 2³³ = 121212733076531 is a prime.

It is a super-2 number, since 2×121221323011123² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221323011127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610661505561 + 60610661505562.

It is an arithmetic number, because the mean of its divisors is an integer number (60610661505562).

Almost surely, 2^{121221323011123} is an apocalyptic number.

121221323011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221323011123 is an equidigital number, since it uses as much as digits as its factorization.

121221323011123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 121221323011123 its reverse (321110323122121), we get a palindrome (442331646133244).

The spelling of 121221323011123 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, three hundred twenty-three million, eleven thousand, one hundred twenty-three".