1111112200021 has 2 divisors, whose sum is σ = 1111112200022. Its totient is φ = 1111112200020.

The previous prime is 1111112199931. The next prime is 1111112200061. The reversal of 1111112200021 is 1200022111111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643548906225 + 467563293796 = 802215^2 + 683786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111112200021 - 2¹⁷ = 1111112068949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111112199974 and 1111112200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111112200061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555556100010 + 555556100011.

It is an arithmetic number, because the mean of its divisors is an integer number (555556100011).

Almost surely, 2^{1111112200021} is an apocalyptic number.

It is an amenable number.

1111112200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111112200021 is an equidigital number, since it uses as much as digits as its factorization.

1111112200021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1111112200021 its reverse (1200022111111), we get a palindrome (2311134311132).

It can be divided in two parts, 111111 and 2200021, that added together give a palindrome (2311132).

The spelling of 1111112200021 in words is "one trillion, one hundred eleven billion, one hundred twelve million, two hundred thousand, twenty-one".