1100323212221 has 8 divisors (see below), whose sum is σ = 1113214986840. Its totient is φ = 1087482293568.

The previous prime is 1100323212211. The next prime is 1100323212251. The reversal of 1100323212221 is 1222123230011.

It can be written as a sum of positive squares in 4 ways, for example, as 136020816100 + 964302396121 = 368810^2 + 981989^2 .

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-1100323212221 is a prime.

It is a super-2 number, since 2×1100323212221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100323212193 and 1100323212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100323212211) 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, 12670466 + ... + 12757011.

It is an arithmetic number, because the mean of its divisors is an integer number (139151873355).

Almost surely, 2^{1100323212221} is an apocalyptic number.

It is an amenable number.

1100323212221 is a deficient number, since it is larger than the sum of its proper divisors (12891774619).

1100323212221 is a wasteful number, since it uses less digits than its factorization.

1100323212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25427983.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1100323212221 its reverse (1222123230011), we get a palindrome (2322446442232).

The spelling of 1100323212221 in words is "one trillion, one hundred billion, three hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".