1221021001112 has 32 divisors (see below), whose sum is σ = 2502108947520. Its totient is φ = 553994881440.

The previous prime is 1221021001093. The next prime is 1221021001129. The reversal of 1221021001112 is 2111001201221.

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, 12634898 + ... + 12731169.

It is an arithmetic number, because the mean of its divisors is an integer number (78190904610).

Almost surely, 2^{1221021001112} is an apocalyptic number.

It is an amenable number.

1221021001112 is an abundant number, since it is smaller than the sum of its proper divisors (1281087946408).

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

1221021001112 is a wasteful number, since it uses less digits than its factorization.

1221021001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25366631 (or 25366627 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221021001112 its reverse (2111001201221), we get a palindrome (3332022202333).

The spelling of 1221021001112 in words is "one trillion, two hundred twenty-one billion, twenty-one million, one thousand, one hundred twelve".