111111002030221 has 16 divisors (see below), whose sum is σ = 113106465526960. Its totient is φ = 109121274247680.

The previous prime is 111111002030123. The next prime is 111111002030239. The reversal of 111111002030221 is 122030200111111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 95487798121 + 111015514232100 = 309011^2 + 10536390^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111002030221 - 2¹⁵ = 111111001997453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111002030195 and 111111002030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111002030291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107537155 + ... + 108565471.

It is an arithmetic number, because the mean of its divisors is an integer number (7069154095435).

Almost surely, 2^{111111002030221} is an apocalyptic number.

It is an amenable number.

111111002030221 is a deficient number, since it is larger than the sum of its proper divisors (1995463496739).

111111002030221 is a wasteful number, since it uses less digits than its factorization.

111111002030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031104.

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

Adding to 111111002030221 its reverse (122030200111111), we get a palindrome (233141202141332).

The spelling of 111111002030221 in words is "one hundred eleven trillion, one hundred eleven billion, two million, thirty thousand, two hundred twenty-one".