121421432431112 has 128 divisors (see below), whose sum is σ = 261092498135040. Its totient is φ = 52433774426880.

The previous prime is 121421432431109. The next prime is 121421432431153. The reversal of 121421432431112 is 211134234124121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429263153 + ... + 429545919.

It is an arithmetic number, because the mean of its divisors is an integer number (2039785141680).

Almost surely, 2^{121421432431112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121421432431112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130546249067520).

121421432431112 is an abundant number, since it is smaller than the sum of its proper divisors (139671065703928).

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

121421432431112 is a wasteful number, since it uses less digits than its factorization.

121421432431112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285931 (or 285927 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

Adding to 121421432431112 its reverse (211134234124121), we get a palindrome (332555666555233).

The spelling of 121421432431112 in words is "one hundred twenty-one trillion, four hundred twenty-one billion, four hundred thirty-two million, four hundred thirty-one thousand, one hundred twelve".