1011321110221 has 8 divisors (see below), whose sum is σ = 1012334811840. Its totient is φ = 1010307893568.

The previous prime is 1011321110201. The next prime is 1011321110231. The reversal of 1011321110221 is 1220111231101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1011321110221 - 2²¹ = 1011319013069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011321110195 and 1011321110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011321110201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4125720 + ... + 4363966.

It is an arithmetic number, because the mean of its divisors is an integer number (126541851480).

Almost surely, 2^{1011321110221} is an apocalyptic number.

It is an amenable number.

1011321110221 is a deficient number, since it is larger than the sum of its proper divisors (1013701619).

1011321110221 is a wasteful number, since it uses less digits than its factorization.

1011321110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242483.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1011321110221 its reverse (1220111231101), we get a palindrome (2231432341322).

The spelling of 1011321110221 in words is "one trillion, eleven billion, three hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".