211012220221 has 8 divisors (see below), whose sum is σ = 230212724544. Its totient is φ = 191814645120.

The previous prime is 211012220191. The next prime is 211012220239. The reversal of 211012220221 is 122022210112.

It is a happy number.

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 211012220221 - 2¹⁵ = 211012187453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211012220195 and 211012220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012220521) 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, 580305 + ... + 871078.

It is an arithmetic number, because the mean of its divisors is an integer number (28776590568).

Almost surely, 2^211012220221 is an apocalyptic number.

It is an amenable number.

211012220221 is a deficient number, since it is larger than the sum of its proper divisors (19200504323).

211012220221 is a wasteful number, since it uses less digits than its factorization.

211012220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464611.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211012220221 its reverse (122022210112), we get a palindrome (333034430333).

The spelling of 211012220221 in words is "two hundred eleven billion, twelve million, two hundred twenty thousand, two hundred twenty-one".