21021201011222 has 8 divisors (see below), whose sum is σ = 32126741168256. Its totient is φ = 10312287288472.

The previous prime is 21021201011203. The next prime is 21021201011233. The reversal of 21021201011222 is 22211010212012.

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 21021201011222.

It is a congruent number.

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, 99156608438 + ... + 99156608649.

It is an arithmetic number, because the mean of its divisors is an integer number (4015842646032).

Almost surely, 2^{21021201011222} is an apocalyptic number.

21021201011222 is a deficient number, since it is larger than the sum of its proper divisors (11105540157034).

21021201011222 is a wasteful number, since it uses less digits than its factorization.

21021201011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198313217142.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21021201011222 its reverse (22211010212012), we get a palindrome (43232211223234).

The spelling of 21021201011222 in words is "twenty-one trillion, twenty-one billion, two hundred one million, eleven thousand, two hundred twenty-two".