121112312212321 has 4 divisors (see below), whose sum is σ = 121113554474644. Its totient is φ = 121111069950000.

The previous prime is 121112312212303. The next prime is 121112312212337. The reversal of 121112312212321 is 123212213211121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98747168739921 + 22365143472400 = 9937161^2 + 4729180^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112312212321 - 2⁵ = 121112312212289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112312212621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620984910 + ... + 621179911.

It is an arithmetic number, because the mean of its divisors is an integer number (30278388618661).

Almost surely, 2^{121112312212321} is an apocalyptic number.

It is an amenable number.

121112312212321 is a deficient number, since it is larger than the sum of its proper divisors (1242262323).

121112312212321 is an equidigital number, since it uses as much as digits as its factorization.

121112312212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242262322.

The product of its digits is 576, while the sum is 25.

Adding to 121112312212321 its reverse (123212213211121), we get a palindrome (244324525423442).

The spelling of 121112312212321 in words is "one hundred twenty-one trillion, one hundred twelve billion, three hundred twelve million, two hundred twelve thousand, three hundred twenty-one".