21212202112202 has 8 divisors (see below), whose sum is σ = 31818542474496. Its totient is φ = 10606021287372.

The previous prime is 21212202112141. The next prime is 21212202112217. The reversal of 21212202112202 is 20221120221212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39551408 + ... + 40084139.

It is an arithmetic number, because the mean of its divisors is an integer number (3977317809312).

Almost surely, 2^{21212202112202} is an apocalyptic number.

21212202112202 is a deficient number, since it is larger than the sum of its proper divisors (10606340362294).

21212202112202 is a wasteful number, since it uses less digits than its factorization.

21212202112202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79768732.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212202112202 its reverse (20221120221212), we get a palindrome (41433322333414).

The spelling of 21212202112202 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred twelve thousand, two hundred two".