121013221123 has 2 divisors, whose sum is σ = 121013221124. Its totient is φ = 121013221122.

The previous prime is 121013221111. The next prime is 121013221171. The reversal of 121013221123 is 321122310121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121013221123 - 2²¹ = 121011123971 is a prime.

It is a super-2 number, since 2×121013221123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121013221123.

It is not a weakly prime, because it can be changed into another prime (121013221183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506610561 + 60506610562.

It is an arithmetic number, because the mean of its divisors is an integer number (60506610562).

Almost surely, 2^121013221123 is an apocalyptic number.

121013221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013221123 is an equidigital number, since it uses as much as digits as its factorization.

121013221123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121013221123 its reverse (321122310121), we get a palindrome (442135531244).

The spelling of 121013221123 in words is "one hundred twenty-one billion, thirteen million, two hundred twenty-one thousand, one hundred twenty-three".