1221033111112 has 64 divisors (see below), whose sum is σ = 2349294647040. Its totient is φ = 594681523200.

The previous prime is 1221033111083. The next prime is 1221033111127. The reversal of 1221033111112 is 2111113301221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221033111112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201255103 + ... + 201261169.

It is an arithmetic number, because the mean of its divisors is an integer number (36707728860).

Almost surely, 2^{1221033111112} is an apocalyptic number.

It is an amenable number.

1221033111112 is a deficient number, since it is larger than the sum of its proper divisors (1128261535928).

1221033111112 is a wasteful number, since it uses less digits than its factorization.

1221033111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582 (or 8578 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1221033111112 its reverse (2111113301221), we get a palindrome (3332146412333).

The spelling of 1221033111112 in words is "one trillion, two hundred twenty-one billion, thirty-three million, one hundred eleven thousand, one hundred twelve".