121242434432 has 64 divisors (see below), whose sum is σ = 284947722240. Its totient is φ = 50284869120.

The previous prime is 121242434431. The next prime is 121242434437. The reversal of 121242434432 is 234434242121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121242434431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154728 + ... + 2210279.

It is an arithmetic number, because the mean of its divisors is an integer number (4452308160).

Almost surely, 2^121242434432 is an apocalyptic number.

It is an amenable number.

121242434432 is an abundant number, since it is smaller than the sum of its proper divisors (163705287808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121242434432 is an equidigital number, since it uses as much as digits as its factorization.

121242434432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365059 (or 4365047 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

Adding to 121242434432 its reverse (234434242121), we get a palindrome (355676676553).

The spelling of 121242434432 in words is "one hundred twenty-one billion, two hundred forty-two million, four hundred thirty-four thousand, four hundred thirty-two".