1221134424142 has 8 divisors (see below), whose sum is σ = 1842939070056. Its totient is φ = 606821400792.

The previous prime is 1221134424089. The next prime is 1221134424151. The reversal of 1221134424142 is 2414244311221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221134424142² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872905233 + ... + 1872905884.

It is an arithmetic number, because the mean of its divisors is an integer number (230367383757).

Almost surely, 2^{1221134424142} is an apocalyptic number.

1221134424142 is a deficient number, since it is larger than the sum of its proper divisors (621804645914).

1221134424142 is a wasteful number, since it uses less digits than its factorization.

1221134424142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745811282.

The product of its digits is 12288, while the sum is 31.

Adding to 1221134424142 its reverse (2414244311221), we get a palindrome (3635378735363).

The spelling of 1221134424142 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-four million, four hundred twenty-four thousand, one hundred forty-two".