121100423443 has 4 divisors (see below), whose sum is σ = 127474129960. Its totient is φ = 114726716928.

The previous prime is 121100423387. The next prime is 121100423447. The reversal of 121100423443 is 344324001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121100423443 - 2²⁹ = 120563552531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100423447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186853230 + ... + 3186853267.

It is an arithmetic number, because the mean of its divisors is an integer number (31868532490).

Almost surely, 2^121100423443 is an apocalyptic number.

121100423443 is a deficient number, since it is larger than the sum of its proper divisors (6373706517).

121100423443 is an equidigital number, since it uses as much as digits as its factorization.

121100423443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373706516.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121100423443 its reverse (344324001121), we get a palindrome (465424424564).

The spelling of 121100423443 in words is "one hundred twenty-one billion, one hundred million, four hundred twenty-three thousand, four hundred forty-three".