21202021220222 has 16 divisors (see below), whose sum is σ = 31844571731280. Its totient is φ = 10587164933568.

The previous prime is 21202021220213. The next prime is 21202021220279. The reversal of 21202021220222 is 22202212020212.

It is a junction number, because it is equal to n+sod(n) for n = 21202021220194 and 21202021220203.

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, 47136248 + ... + 47583924.

It is an arithmetic number, because the mean of its divisors is an integer number (1990285733205).

Almost surely, 2^{21202021220222} is an apocalyptic number.

21202021220222 is a deficient number, since it is larger than the sum of its proper divisors (10642550511058).

21202021220222 is a wasteful number, since it uses less digits than its factorization.

21202021220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478555.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21202021220222 its reverse (22202212020212), we get a palindrome (43404233240434).

The spelling of 21202021220222 in words is "twenty-one trillion, two hundred two billion, twenty-one million, two hundred twenty thousand, two hundred twenty-two".