121210012423 has 2 divisors, whose sum is σ = 121210012424. Its totient is φ = 121210012422.

The previous prime is 121210012387. The next prime is 121210012459. The reversal of 121210012423 is 324210012121.

It is a balanced prime because it is at equal distance from previous prime (121210012387) and next prime (121210012459).

It is an emirp because it is prime and its reverse (324210012121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121210012423 is a prime.

It is a super-2 number, since 2×121210012423² (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 121210012423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210012123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605006211 + 60605006212.

It is an arithmetic number, because the mean of its divisors is an integer number (60605006212).

Almost surely, 2^121210012423 is an apocalyptic number.

121210012423 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210012423 is an equidigital number, since it uses as much as digits as its factorization.

121210012423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121210012423 its reverse (324210012121), we get a palindrome (445420024544).

The spelling of 121210012423 in words is "one hundred twenty-one billion, two hundred ten million, twelve thousand, four hundred twenty-three".