121244231431 has 2 divisors, whose sum is σ = 121244231432. Its totient is φ = 121244231430.

The previous prime is 121244231417. The next prime is 121244231461. The reversal of 121244231431 is 134132442121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (134132442121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121244231431 - 2¹³ = 121244223239 is a prime.

It is a super-2 number, since 2×121244231431² (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 121244231431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121244231461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60622115715 + 60622115716.

It is an arithmetic number, because the mean of its divisors is an integer number (60622115716).

Almost surely, 2^121244231431 is an apocalyptic number.

121244231431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121244231431 is an equidigital number, since it uses as much as digits as its factorization.

121244231431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

Adding to 121244231431 its reverse (134132442121), we get a palindrome (255376673552).

The spelling of 121244231431 in words is "one hundred twenty-one billion, two hundred forty-four million, two hundred thirty-one thousand, four hundred thirty-one".