1213420553222 has 4 divisors (see below), whose sum is σ = 1820130829836. Its totient is φ = 606710276610.

The previous prime is 1213420553197. The next prime is 1213420553243. The reversal of 1213420553222 is 2223550243121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303355138304 + ... + 303355138307.

It is an arithmetic number, because the mean of its divisors is an integer number (455032707459).

Almost surely, 2^{1213420553222} is an apocalyptic number.

1213420553222 is a deficient number, since it is larger than the sum of its proper divisors (606710276614).

1213420553222 is an equidigital number, since it uses as much as digits as its factorization.

1213420553222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606710276613.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 1213420553222 its reverse (2223550243121), we get a palindrome (3436970796343).

The spelling of 1213420553222 in words is "one trillion, two hundred thirteen billion, four hundred twenty million, five hundred fifty-three thousand, two hundred twenty-two".