1222203220421 has 4 divisors (see below), whose sum is σ = 1222216390752. Its totient is φ = 1222190050092.

The previous prime is 1222203220409. The next prime is 1222203220423. The reversal of 1222203220421 is 1240223022221.

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 a de Polignac number, because none of the positive numbers 2^k-1222203220421 is a prime.

It is a super-2 number, since 2×1222203220421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222203220423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6444971 + ... + 6631896.

It is an arithmetic number, because the mean of its divisors is an integer number (305554097688).

Almost surely, 2^{1222203220421} is an apocalyptic number.

It is an amenable number.

1222203220421 is a deficient number, since it is larger than the sum of its proper divisors (13170331).

1222203220421 is an equidigital number, since it uses as much as digits as its factorization.

1222203220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13170330.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 1222203220421 its reverse (1240223022221), we get a palindrome (2462426242642).

The spelling of 1222203220421 in words is "one trillion, two hundred twenty-two billion, two hundred three million, two hundred twenty thousand, four hundred twenty-one".