121210440443 has 4 divisors (see below), whose sum is σ = 121428054000. Its totient is φ = 120992826888.

The previous prime is 121210440383. The next prime is 121210440451. The reversal of 121210440443 is 344044012121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344044012121 = 3613 ⋅95223917.

It is a cyclic number.

It is not a de Polignac number, because 121210440443 - 2²⁸ = 120942004987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210443443) 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, 108805943 + ... + 108807056.

It is an arithmetic number, because the mean of its divisors is an integer number (30357013500).

Almost surely, 2^121210440443 is an apocalyptic number.

121210440443 is a deficient number, since it is larger than the sum of its proper divisors (217613557).

121210440443 is an equidigital number, since it uses as much as digits as its factorization.

121210440443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217613556.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 121210440443 its reverse (344044012121), we get a palindrome (465254452564).

The spelling of 121210440443 in words is "one hundred twenty-one billion, two hundred ten million, four hundred forty thousand, four hundred forty-three".