211121320102021 has 12 divisors (see below), whose sum is σ = 245652966278688. Its totient is φ = 180914814195192.

The previous prime is 211121320101907. The next prime is 211121320102039. The reversal of 211121320102021 is 120201023121112.

It is not a de Polignac number, because 211121320102021 - 2¹¹ = 211121320099973 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 211121320102021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121320162021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551203281 + ... + 551586166.

It is an arithmetic number, because the mean of its divisors is an integer number (20471080523224).

Almost surely, 2^{211121320102021} is an apocalyptic number.

It is an amenable number.

211121320102021 is a deficient number, since it is larger than the sum of its proper divisors (34531646176667).

211121320102021 is a wasteful number, since it uses less digits than its factorization.

211121320102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102793368 (or 1102793361 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211121320102021 its reverse (120201023121112), we get a palindrome (331322343223133).

The spelling of 211121320102021 in words is "two hundred eleven trillion, one hundred twenty-one billion, three hundred twenty million, one hundred two thousand, twenty-one".