111201122212021 has 2 divisors, whose sum is σ = 111201122212022. Its totient is φ = 111201122212020.

The previous prime is 111201122212007. The next prime is 111201122212039. The reversal of 111201122212021 is 120212221102111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98788789955025 + 12412332256996 = 9939255^2 + 3523114^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201122212021 - 2⁴¹ = 109002098956469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201122212021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111201122212091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600561106010 + 55600561106011.

It is an arithmetic number, because the mean of its divisors is an integer number (55600561106011).

Almost surely, 2^{111201122212021} is an apocalyptic number.

It is an amenable number.

111201122212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201122212021 is an equidigital number, since it uses as much as digits as its factorization.

111201122212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111201122212021 its reverse (120212221102111), we get a palindrome (231413343314132).

The spelling of 111201122212021 in words is "one hundred eleven trillion, two hundred one billion, one hundred twenty-two million, two hundred twelve thousand, twenty-one".