211222020222221 has 8 divisors (see below), whose sum is σ = 215798787411840. Its totient is φ = 206648698101568.

The previous prime is 211222020222149. The next prime is 211222020222259. The reversal of 211222020222221 is 122222020222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222020222221 is a prime.

It is a super-2 number, since 2×211222020222221² (a number of 29 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 (211222020222721) 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, 861143291 + ... + 861388536.

It is an arithmetic number, because the mean of its divisors is an integer number (26974848426480).

Almost surely, 2^{211222020222221} is an apocalyptic number.

It is an amenable number.

211222020222221 is a deficient number, since it is larger than the sum of its proper divisors (4576767189619).

211222020222221 is a wasteful number, since it uses less digits than its factorization.

211222020222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722534483.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 211222020222221 its reverse (122222020222112), we get a palindrome (333444040444333).

The spelling of 211222020222221 in words is "two hundred eleven trillion, two hundred twenty-two billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".