211102202021 has 16 divisors (see below), whose sum is σ = 216840830976. Its totient is φ = 205457070000.

The previous prime is 211102201991. The next prime is 211102202063. The reversal of 211102202021 is 120202201112.

It is a cyclic number.

It is not a de Polignac number, because 211102202021 - 2³⁴ = 193922332837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211102201987 and 211102202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102202221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1717076 + ... + 1835906.

It is an arithmetic number, because the mean of its divisors is an integer number (13552551936).

Almost surely, 2^211102202021 is an apocalyptic number.

It is an amenable number.

211102202021 is a deficient number, since it is larger than the sum of its proper divisors (5738628955).

211102202021 is a wasteful number, since it uses less digits than its factorization.

211102202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119224.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211102202021 its reverse (120202201112), we get a palindrome (331304403133).

Subtracting from 211102202021 its reverse (120202201112), we obtain a palindrome (90900000909).

The spelling of 211102202021 in words is "two hundred eleven billion, one hundred two million, two hundred two thousand, twenty-one".