211101222202021 has 16 divisors (see below), whose sum is σ = 214073681310720. Its totient is φ = 208148299983360.

The previous prime is 211101222202019. The next prime is 211101222202027. The reversal of 211101222202021 is 120202222101112.

It is not a de Polignac number, because 211101222202021 - 2¹ = 211101222202019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211101222202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101222202027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63098901 + ... + 66360181.

It is an arithmetic number, because the mean of its divisors is an integer number (13379605081920).

Almost surely, 2^{211101222202021} is an apocalyptic number.

It is an amenable number.

211101222202021 is a deficient number, since it is larger than the sum of its proper divisors (2972459108699).

211101222202021 is a wasteful number, since it uses less digits than its factorization.

211101222202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264276.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211101222202021 its reverse (120202222101112), we get a palindrome (331303444303133).

The spelling of 211101222202021 in words is "two hundred eleven trillion, one hundred one billion, two hundred twenty-two million, two hundred two thousand, twenty-one".