1213142221242 has 24 divisors (see below), whose sum is σ = 3003971214816. Its totient is φ = 346612063176.

The previous prime is 1213142221219. The next prime is 1213142221253. The reversal of 1213142221242 is 2421222413121.

1213142221242 is a `hidden beast` number, since 1 + 2 + 1 + 314 + 222 + 124 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4814056308 + ... + 4814056559.

It is an arithmetic number, because the mean of its divisors is an integer number (125165467284).

Almost surely, 2^{1213142221242} is an apocalyptic number.

1213142221242 is an abundant number, since it is smaller than the sum of its proper divisors (1790828993574).

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

1213142221242 is a wasteful number, since it uses less digits than its factorization.

1213142221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9628112882 (or 9628112879 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 1213142221242 its reverse (2421222413121), we get a palindrome (3634364634363).

The spelling of 1213142221242 in words is "one trillion, two hundred thirteen billion, one hundred forty-two million, two hundred twenty-one thousand, two hundred forty-two".