1111210010221 has 4 divisors (see below), whose sum is σ = 1111956291100. Its totient is φ = 1110463729344.

The previous prime is 1111210010191. The next prime is 1111210010233. The reversal of 1111210010221 is 1220100121111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75671757225 + 1035538252996 = 275085^2 + 1017614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111210010221 - 2¹⁵ = 1111209977453 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 (1111210010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373138206 + ... + 373141183.

It is an arithmetic number, because the mean of its divisors is an integer number (277989072775).

Almost surely, 2^{1111210010221} is an apocalyptic number.

It is an amenable number.

1111210010221 is a deficient number, since it is larger than the sum of its proper divisors (746280879).

1111210010221 is an equidigital number, since it uses as much as digits as its factorization.

1111210010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746280878.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111210010221 its reverse (1220100121111), we get a palindrome (2331310131332).

The spelling of 1111210010221 in words is "one trillion, one hundred eleven billion, two hundred ten million, ten thousand, two hundred twenty-one".