111101102201021 has 2 divisors, whose sum is σ = 111101102201022. Its totient is φ = 111101102201020.

The previous prime is 111101102200961. The next prime is 111101102201053. The reversal of 111101102201021 is 120102201101111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72632750575225 + 38468351625796 = 8522485^2 + 6202286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111101102201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111101102200987 and 111101102201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111101102209021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550551100510 + 55550551100511.

It is an arithmetic number, because the mean of its divisors is an integer number (55550551100511).

Almost surely, 2^{111101102201021} is an apocalyptic number.

It is an amenable number.

111101102201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101102201021 is an equidigital number, since it uses as much as digits as its factorization.

111101102201021 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 14.

Adding to 111101102201021 its reverse (120102201101111), we get a palindrome (231203303302132).

The spelling of 111101102201021 in words is "one hundred eleven trillion, one hundred one billion, one hundred two million, two hundred one thousand, twenty-one".