211020422221 has 24 divisors (see below), whose sum is σ = 260636667840. Its totient is φ = 169760529792.

The previous prime is 211020422213. The next prime is 211020422269. The reversal of 211020422221 is 122224020112.

It is not a de Polignac number, because 211020422221 - 2³ = 211020422213 is a prime.

It is a super-2 number, since 2×211020422221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020422021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53775 + ... + 651868.

It is an arithmetic number, because the mean of its divisors is an integer number (10859861160).

Almost surely, 2^211020422221 is an apocalyptic number.

It is an amenable number.

211020422221 is a deficient number, since it is larger than the sum of its proper divisors (49616245619).

211020422221 is a wasteful number, since it uses less digits than its factorization.

211020422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706033 (or 706026 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211020422221 its reverse (122224020112), we get a palindrome (333244442333).

The spelling of 211020422221 in words is "two hundred eleven billion, twenty million, four hundred twenty-two thousand, two hundred twenty-one".