121242434431 has 2 divisors, whose sum is σ = 121242434432. Its totient is φ = 121242434430.

The previous prime is 121242434399. The next prime is 121242434437. The reversal of 121242434431 is 134434242121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (134434242121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121242434431 - 2⁵ = 121242434399 is a prime.

It is a super-2 number, since 2×121242434431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121242434393 and 121242434402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121242434437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621217215 + 60621217216.

It is an arithmetic number, because the mean of its divisors is an integer number (60621217216).

Almost surely, 2^121242434431 is an apocalyptic number.

121242434431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242434431 is an equidigital number, since it uses as much as digits as its factorization.

121242434431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 31.

Adding to 121242434431 its reverse (134434242121), we get a palindrome (255676676552).

The spelling of 121242434431 in words is "one hundred twenty-one billion, two hundred forty-two million, four hundred thirty-four thousand, four hundred thirty-one".