111220000201021 has 2 divisors, whose sum is σ = 111220000201022. Its totient is φ = 111220000201020.

The previous prime is 111220000201003. The next prime is 111220000201031. The reversal of 111220000201021 is 120102000022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57970711822500 + 53249288378521 = 7613850^2 + 7297211^2 .

It is an emirp because it is prime and its reverse (120102000022111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111220000201021 - 2⁹ = 111220000200509 is a prime.

It is a super-2 number, since 2×111220000201021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111220000200992 and 111220000201010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220000201031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610000100510 + 55610000100511.

It is an arithmetic number, because the mean of its divisors is an integer number (55610000100511).

Almost surely, 2^{111220000201021} is an apocalyptic number.

It is an amenable number.

111220000201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220000201021 is an equidigital number, since it uses as much as digits as its factorization.

111220000201021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111220000201021 its reverse (120102000022111), we get a palindrome (231322000223132).

The spelling of 111220000201021 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred one thousand, twenty-one".