1112211221021 has 8 divisors (see below), whose sum is σ = 1114273595064. Its totient is φ = 1110149314560.

The previous prime is 1112211220999. The next prime is 1112211221063. The reversal of 1112211221021 is 1201221122111.

It can be written as a sum of positive squares in 4 ways, for example, as 418673702500 + 693537518521 = 647050^2 + 832789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112211221021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112211221071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4838921 + ... + 5063553.

It is an arithmetic number, because the mean of its divisors is an integer number (139284199383).

Almost surely, 2^{1112211221021} is an apocalyptic number.

It is an amenable number.

1112211221021 is a deficient number, since it is larger than the sum of its proper divisors (2062374043).

1112211221021 is an equidigital number, since it uses as much as digits as its factorization.

1112211221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233791.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1112211221021 its reverse (1201221122111), we get a palindrome (2313432343132).

The spelling of 1112211221021 in words is "one trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, twenty-one".