121220000123 has 2 divisors, whose sum is σ = 121220000124. Its totient is φ = 121220000122.

The previous prime is 121220000059. The next prime is 121220000173. The reversal of 121220000123 is 321000022121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220000123 - 2⁶ = 121220000059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121220000098 and 121220000107.

It is not a weakly prime, because it can be changed into another prime (121220000173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610000061 + 60610000062.

It is an arithmetic number, because the mean of its divisors is an integer number (60610000062).

Almost surely, 2^121220000123 is an apocalyptic number.

121220000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220000123 is an equidigital number, since it uses as much as digits as its factorization.

121220000123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121220000123 its reverse (321000022121), we get a palindrome (442220022244).

The spelling of 121220000123 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-three", and thus it is an aban number.