1222221111102 has 24 divisors (see below), whose sum is σ = 2648251961784. Its totient is φ = 407390695344.

The previous prime is 1222221111049. The next prime is 1222221111121. The reversal of 1222221111102 is 2011111222221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 896293 + ... + 1802160.

It is an arithmetic number, because the mean of its divisors is an integer number (110343831741).

Almost surely, 2^{1222221111102} is an apocalyptic number.

1222221111102 is an abundant number, since it is smaller than the sum of its proper divisors (1426030850682).

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

1222221111102 is a wasteful number, since it uses less digits than its factorization.

1222221111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723624 (or 2723621 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222221111102 its reverse (2011111222221), we get a palindrome (3233332333323).

The spelling of 1222221111102 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred two".