211202210110021 has 8 divisors (see below), whose sum is σ = 227453142328160. Its totient is φ = 194951936229552.

The previous prime is 211202210110009. The next prime is 211202210110069. The reversal of 211202210110021 is 120011012202112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211202210110021 - 2²¹ = 211202208012869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202210109977 and 211202210110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202210110121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163918011 + ... + 165201448.

It is an arithmetic number, because the mean of its divisors is an integer number (28431642791020).

Almost surely, 2^{211202210110021} is an apocalyptic number.

It is an amenable number.

211202210110021 is a deficient number, since it is larger than the sum of its proper divisors (16250932218139).

211202210110021 is a wasteful number, since it uses less digits than its factorization.

211202210110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329168835.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211202210110021 its reverse (120011012202112), we get a palindrome (331213222312133).

The spelling of 211202210110021 in words is "two hundred eleven trillion, two hundred two billion, two hundred ten million, one hundred ten thousand, twenty-one".