1213554243222 has 24 divisors (see below), whose sum is σ = 2632925563320. Its totient is φ = 403970690880.

The previous prime is 1213554243211. The next prime is 1213554243227. The reversal of 1213554243222 is 2223424553121.

1213554243222 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 5 + 5 + 424 + 3 + 222 = 666.

It is a super-2 number, since 2×1213554243222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213554243227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45602179 + ... + 45628782.

It is an arithmetic number, because the mean of its divisors is an integer number (109705231805).

Almost surely, 2^{1213554243222} is an apocalyptic number.

1213554243222 is an abundant number, since it is smaller than the sum of its proper divisors (1419371320098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213554243222 is a wasteful number, since it uses less digits than its factorization.

1213554243222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91231708 (or 91231705 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 1213554243222 its reverse (2223424553121), we get a palindrome (3436978796343).

The spelling of 1213554243222 in words is "one trillion, two hundred thirteen billion, five hundred fifty-four million, two hundred forty-three thousand, two hundred twenty-two".