111010010221 has 12 divisors (see below), whose sum is σ = 122044776700. Its totient is φ = 100897093440.

The previous prime is 111010010219. The next prime is 111010010257. The reversal of 111010010221 is 122010010111.

It can be written as a sum of positive squares in 2 ways, for example, as 64003434121 + 47006576100 = 252989^2 + 216810^2 .

It is not a de Polignac number, because 111010010221 - 2¹ = 111010010219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111010010198 and 111010010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010010291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500545 + ... + 687433.

Almost surely, 2^111010010221 is an apocalyptic number.

111010010221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111010010221 is a deficient number, since it is larger than the sum of its proper divisors (11034766479).

111010010221 is a wasteful number, since it uses less digits than its factorization.

111010010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191820 (or 191809 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111010010221 its reverse (122010010111), we get a palindrome (233020020332).

The spelling of 111010010221 in words is "one hundred eleven billion, ten million, ten thousand, two hundred twenty-one".