221212311142 has 16 divisors (see below), whose sum is σ = 349449922800. Its totient is φ = 104734581120.

The previous prime is 221212311137. The next prime is 221212311167. The reversal of 221212311142 is 241113212122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313959 + ... + 1472722.

It is an arithmetic number, because the mean of its divisors is an integer number (21840620175).

Almost surely, 2^221212311142 is an apocalyptic number.

221212311142 is a deficient number, since it is larger than the sum of its proper divisors (128237611658).

221212311142 is a wasteful number, since it uses less digits than its factorization.

221212311142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788791.

The product of its digits is 384, while the sum is 22.

Adding to 221212311142 its reverse (241113212122), we get a palindrome (462325523264).

The spelling of 221212311142 in words is "two hundred twenty-one billion, two hundred twelve million, three hundred eleven thousand, one hundred forty-two".