1100012331221 has 4 divisors (see below), whose sum is σ = 1100769395532. Its totient is φ = 1099255266912.

The previous prime is 1100012331191. The next prime is 1100012331251. The reversal of 1100012331221 is 1221332100011.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1100012331191) and next prime (1100012331251).

It can be written as a sum of positive squares in 2 ways, for example, as 1082617359121 + 17394972100 = 1040489^2 + 131890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100012331221 - 2³⁴ = 1082832462037 is a prime.

It is a super-2 number, since 2×1100012331221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100012331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100012331251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378529976 + ... + 378532881.

It is an arithmetic number, because the mean of its divisors is an integer number (275192348883).

Almost surely, 2^{1100012331221} is an apocalyptic number.

It is an amenable number.

1100012331221 is a deficient number, since it is larger than the sum of its proper divisors (757064311).

1100012331221 is an equidigital number, since it uses as much as digits as its factorization.

1100012331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757064310.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1100012331221 its reverse (1221332100011), we get a palindrome (2321344431232).

The spelling of 1100012331221 in words is "one trillion, one hundred billion, twelve million, three hundred thirty-one thousand, two hundred twenty-one".