211134022221 has 32 divisors (see below), whose sum is σ = 302000512000. Its totient is φ = 130811915520.

The previous prime is 211134022199. The next prime is 211134022237. The reversal of 211134022221 is 122220431112.

It is a happy number.

It is not a de Polignac number, because 211134022221 - 2⁶ = 211134022157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211134022321) 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, 805680 + ... + 1035078.

It is an arithmetic number, because the mean of its divisors is an integer number (9437516000).

Almost surely, 2^211134022221 is an apocalyptic number.

It is an amenable number.

211134022221 is a deficient number, since it is larger than the sum of its proper divisors (90866489779).

211134022221 is a wasteful number, since it uses less digits than its factorization.

211134022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229729.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211134022221 its reverse (122220431112), we get a palindrome (333354453333).

The spelling of 211134022221 in words is "two hundred eleven billion, one hundred thirty-four million, twenty-two thousand, two hundred twenty-one".