121030210123 has 2 divisors, whose sum is σ = 121030210124. Its totient is φ = 121030210122.

The previous prime is 121030210111. The next prime is 121030210129. The reversal of 121030210123 is 321012030121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121030210123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121030210097 and 121030210106.

It is not a weakly prime, because it can be changed into another prime (121030210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515105061 + 60515105062.

It is an arithmetic number, because the mean of its divisors is an integer number (60515105062).

Almost surely, 2^121030210123 is an apocalyptic number.

121030210123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121030210123 is an equidigital number, since it uses as much as digits as its factorization.

121030210123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121030210123 its reverse (321012030121), we get a palindrome (442042240244).

The spelling of 121030210123 in words is "one hundred twenty-one billion, thirty million, two hundred ten thousand, one hundred twenty-three".