20210221222 has 16 divisors (see below), whose sum is σ = 30822237072. Its totient is φ = 9936249120.

The previous prime is 20210221219. The next prime is 20210221259. The reversal of 20210221222 is 22212201202.

It is a junction number, because it is equal to n+sod(n) for n = 20210221196 and 20210221205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378408 + ... + 428500.

It is an arithmetic number, because the mean of its divisors is an integer number (1926389817).

Almost surely, 2^20210221222 is an apocalyptic number.

20210221222 is a deficient number, since it is larger than the sum of its proper divisors (10612015850).

20210221222 is a wasteful number, since it uses less digits than its factorization.

20210221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53463.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20210221222 its reverse (22212201202), we get a palindrome (42422422424).

The spelling of 20210221222 in words is "twenty billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".