1212200122321 has 4 divisors (see below), whose sum is σ = 1217272089600. Its totient is φ = 1207128155044.

The previous prime is 1212200122319. The next prime is 1212200122337. The reversal of 1212200122321 is 1232210022121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212200122321 - 2¹ = 1212200122319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212200122361) 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, 2535983281 + ... + 2535983758.

It is an arithmetic number, because the mean of its divisors is an integer number (304318022400).

Almost surely, 2^{1212200122321} is an apocalyptic number.

It is an amenable number.

1212200122321 is a deficient number, since it is larger than the sum of its proper divisors (5071967279).

1212200122321 is an equidigital number, since it uses as much as digits as its factorization.

1212200122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071967278.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212200122321 its reverse (1232210022121), we get a palindrome (2444410144442).

The spelling of 1212200122321 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred twenty-two thousand, three hundred twenty-one".