121431004443 has 80 divisors (see below), whose sum is σ = 224120497920. Its totient is φ = 63960197184.

The previous prime is 121431004433. The next prime is 121431004451. The reversal of 121431004443 is 344400134121.

121431004443 is a `hidden beast` number, since 1 + 214 + 3 + 1 + 0 + 0 + 4 + 443 = 666.

It is not a de Polignac number, because 121431004443 - 2¹² = 121431000347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121431004433) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 246280 + ... + 550922.

It is an arithmetic number, because the mean of its divisors is an integer number (2801506224).

Almost surely, 2^121431004443 is an apocalyptic number.

121431004443 is a deficient number, since it is larger than the sum of its proper divisors (102689493477).

121431004443 is a wasteful number, since it uses less digits than its factorization.

121431004443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304718 (or 304709 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 121431004443 its reverse (344400134121), we get a palindrome (465831138564).

The spelling of 121431004443 in words is "one hundred twenty-one billion, four hundred thirty-one million, four thousand, four hundred forty-three".