121431221382 has 16 divisors (see below), whose sum is σ = 242946600192. Its totient is φ = 40463047560.

The previous prime is 121431221381. The next prime is 121431221393. The reversal of 121431221382 is 283122134121.

121431221382 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431221381) 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, 3487794 + ... + 3522437.

It is an arithmetic number, because the mean of its divisors is an integer number (15184162512).

Almost surely, 2^121431221382 is an apocalyptic number.

121431221382 is an abundant number, since it is smaller than the sum of its proper divisors (121515378810).

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

121431221382 is a wasteful number, since it uses less digits than its factorization.

121431221382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013123.

The product of its digits is 4608, while the sum is 30.

The spelling of 121431221382 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, three hundred eighty-two".