1011110331221 has 4 divisors (see below), whose sum is σ = 1011114199200. Its totient is φ = 1011106463244.

The previous prime is 1011110331167. The next prime is 1011110331233. The reversal of 1011110331221 is 1221330111101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011110331221 - 2²² = 1011106136917 is a prime.

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 1011110331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011110331241) 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, 1511051 + ... + 2074968.

It is an arithmetic number, because the mean of its divisors is an integer number (252778549800).

Almost surely, 2^{1011110331221} is an apocalyptic number.

It is an amenable number.

1011110331221 is a deficient number, since it is larger than the sum of its proper divisors (3867979).

1011110331221 is an equidigital number, since it uses as much as digits as its factorization.

1011110331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867978.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1011110331221 its reverse (1221330111101), we get a palindrome (2232440442322).

The spelling of 1011110331221 in words is "one trillion, eleven billion, one hundred ten million, three hundred thirty-one thousand, two hundred twenty-one".