21020212021222 has 8 divisors (see below), whose sum is σ = 31693687555896. Its totient is φ = 10455649502592.

The previous prime is 21020212021219. The next prime is 21020212021223. The reversal of 21020212021222 is 22212021202012.

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 21020212021222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020212021223) 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, 27228253528 + ... + 27228254299.

It is an arithmetic number, because the mean of its divisors is an integer number (3961710944487).

Almost surely, 2^{21020212021222} is an apocalyptic number.

21020212021222 is a deficient number, since it is larger than the sum of its proper divisors (10673475534674).

21020212021222 is a wasteful number, since it uses less digits than its factorization.

21020212021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54456508022.

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

Adding to 21020212021222 its reverse (22212021202012), we get a palindrome (43232233223234).

The spelling of 21020212021222 in words is "twenty-one trillion, twenty billion, two hundred twelve million, twenty-one thousand, two hundred twenty-two".