1222221021112 has 96 divisors (see below), whose sum is σ = 2927492167680. Its totient is φ = 467918605440.

The previous prime is 1222221021107. The next prime is 1222221021113. The reversal of 1222221021112 is 2111201222221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222221021112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222221021113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1789588 + ... + 2376355.

It is an arithmetic number, because the mean of its divisors is an integer number (30494710080).

Almost surely, 2^{1222221021112} is an apocalyptic number.

It is an amenable number.

1222221021112 is an abundant number, since it is smaller than the sum of its proper divisors (1705271146568).

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

1222221021112 is a wasteful number, since it uses less digits than its factorization.

1222221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166013 (or 4165996 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222221021112 its reverse (2111201222221), we get a palindrome (3333422243333).

The spelling of 1222221021112 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".