21210202022 has 8 divisors (see below), whose sum is σ = 31901994336. Its totient is φ = 10576203912.

The previous prime is 21210202021. The next prime is 21210202043. The reversal of 21210202022 is 22020201212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210201988 and 21210202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210202021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14447633 + ... + 14449100.

It is an arithmetic number, because the mean of its divisors is an integer number (3987749292).

Almost surely, 2^21210202022 is an apocalyptic number.

21210202022 is a deficient number, since it is larger than the sum of its proper divisors (10691792314).

21210202022 is a wasteful number, since it uses less digits than its factorization.

21210202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28897102.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21210202022 its reverse (22020201212), we get a palindrome (43230403234).

The spelling of 21210202022 in words is "twenty-one billion, two hundred ten million, two hundred two thousand, twenty-two".