1221111110104 has 16 divisors (see below), whose sum is σ = 2291489746920. Its totient is φ = 610047177600.

The previous prime is 1221111110071. The next prime is 1221111110123. The reversal of 1221111110104 is 4010111111221.

It is a happy number.

It is a super-2 number, since 2×1221111110104² (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, 63536974 + ... + 63556189.

Almost surely, 2^{1221111110104} is an apocalyptic number.

It is an amenable number.

1221111110104 is a deficient number, since it is larger than the sum of its proper divisors (1070378636816).

1221111110104 is a wasteful number, since it uses less digits than its factorization.

1221111110104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127094370 (or 127094366 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1221111110104 its reverse (4010111111221), we get a palindrome (5231222221325).

The spelling of 1221111110104 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, one hundred four".