121342522431 has 24 divisors (see below), whose sum is σ = 183888369840. Its totient is φ = 70742191104.

The previous prime is 121342522409. The next prime is 121342522451. The reversal of 121342522431 is 134225243121.

It is a happy number.

It is not a de Polignac number, because 121342522431 - 2²¹ = 121340425279 is a prime.

It is a super-2 number, since 2×121342522431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342522451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4295266 + ... + 4323423.

It is an arithmetic number, because the mean of its divisors is an integer number (7662015410).

Almost surely, 2^121342522431 is an apocalyptic number.

121342522431 is a deficient number, since it is larger than the sum of its proper divisors (62545847409).

121342522431 is a wasteful number, since it uses less digits than its factorization.

121342522431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618743 (or 8618724 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 121342522431 its reverse (134225243121), we get a palindrome (255567765552).

The spelling of 121342522431 in words is "one hundred twenty-one billion, three hundred forty-two million, five hundred twenty-two thousand, four hundred thirty-one".