111221202122101 has 2 divisors, whose sum is σ = 111221202122102. Its totient is φ = 111221202122100.

The previous prime is 111221202122087. The next prime is 111221202122113. The reversal of 111221202122101 is 101221202122111.

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., 105392603888100 + 5828598234001 = 10266090^2 + 2414249^2 .

It is an emirp because it is prime and its reverse (101221202122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111221202122101 - 2¹¹ = 111221202120053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221202122501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610601061050 + 55610601061051.

It is an arithmetic number, because the mean of its divisors is an integer number (55610601061051).

Almost surely, 2^{111221202122101} is an apocalyptic number.

It is an amenable number.

111221202122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221202122101 is an equidigital number, since it uses as much as digits as its factorization.

111221202122101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111221202122101 its reverse (101221202122111), we get a palindrome (212442404244212).

The spelling of 111221202122101 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred one".