21020210212222 has 8 divisors (see below), whose sum is σ = 33955724189016. Its totient is φ = 9701635482552.

The previous prime is 21020210212207. The next prime is 21020210212223. The reversal of 21020210212222 is 22221201202012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21020210212222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020210212223) 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, 404234811748 + ... + 404234811799.

It is an arithmetic number, because the mean of its divisors is an integer number (4244465523627).

Almost surely, 2^{21020210212222} is an apocalyptic number.

21020210212222 is a deficient number, since it is larger than the sum of its proper divisors (12935513976794).

21020210212222 is a wasteful number, since it uses less digits than its factorization.

21020210212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808469623562.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21020210212222 its reverse (22221201202012), we get a palindrome (43241411414234).

The spelling of 21020210212222 in words is "twenty-one trillion, twenty billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-two".