111201010202021 has 4 divisors (see below), whose sum is σ = 113023977582444. Its totient is φ = 109378042821600.

The previous prime is 111201010202011. The next prime is 111201010202027. The reversal of 111201010202021 is 120202010102111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23000944564900 + 88200065637121 = 4795930^2 + 9391489^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201010202021 - 2¹⁰ = 111201010200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111201010201987 and 111201010202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201010202027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911483690120 + ... + 911483690241.

It is an arithmetic number, because the mean of its divisors is an integer number (28255994395611).

Almost surely, 2^{111201010202021} is an apocalyptic number.

It is an amenable number.

111201010202021 is a deficient number, since it is larger than the sum of its proper divisors (1822967380423).

111201010202021 is an equidigital number, since it uses as much as digits as its factorization.

111201010202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822967380422.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111201010202021 its reverse (120202010102111), we get a palindrome (231403020304132).

The spelling of 111201010202021 in words is "one hundred eleven trillion, two hundred one billion, ten million, two hundred two thousand, twenty-one".