211220210221211 has 32 divisors (see below), whose sum is σ = 221331419939520. Its totient is φ = 201386164032000.

The previous prime is 211220210221177. The next prime is 211220210221231. The reversal of 211220210221211 is 112122012022112.

It is a cyclic number.

It is not a de Polignac number, because 211220210221211 - 2⁶ = 211220210221147 is a prime.

It is a super-2 number, since 2×211220210221211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220210221231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427202201 + ... + 427696341.

It is an arithmetic number, because the mean of its divisors is an integer number (6916606873110).

Almost surely, 2^{211220210221211} is an apocalyptic number.

211220210221211 is a deficient number, since it is larger than the sum of its proper divisors (10111209718309).

211220210221211 is a wasteful number, since it uses less digits than its factorization.

211220210221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495455.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211220210221211 its reverse (112122012022112), we get a palindrome (323342222243323).

The spelling of 211220210221211 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred ten million, two hundred twenty-one thousand, two hundred eleven".