111021211200401 has 2 divisors, whose sum is σ = 111021211200402. Its totient is φ = 111021211200400.

The previous prime is 111021211200353. The next prime is 111021211200437. The reversal of 111021211200401 is 104002112120111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61002723059776 + 50018488140625 = 7810424^2 + 7072375^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021211200401 - 2²⁶ = 111021144091537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111021211200401.

It is not a weakly prime, because it can be changed into another prime (111021211200481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510605600200 + 55510605600201.

It is an arithmetic number, because the mean of its divisors is an integer number (55510605600201).

Almost surely, 2^{111021211200401} is an apocalyptic number.

It is an amenable number.

111021211200401 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021211200401 is an equidigital number, since it uses as much as digits as its factorization.

111021211200401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111021211200401 its reverse (104002112120111), we get a palindrome (215023323320512).

The spelling of 111021211200401 in words is "one hundred eleven trillion, twenty-one billion, two hundred eleven million, two hundred thousand, four hundred one".