21001110211222 has 8 divisors (see below), whose sum is σ = 32871302939376. Its totient is φ = 10044009231432.

The previous prime is 21001110211181. The next prime is 21001110211267. The reversal of 21001110211222 is 22211201110012.

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 = 21001110211196 and 21001110211205.

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, 228272937033 + ... + 228272937124.

It is an arithmetic number, because the mean of its divisors is an integer number (4108912867422).

Almost surely, 2^{21001110211222} is an apocalyptic number.

21001110211222 is a deficient number, since it is larger than the sum of its proper divisors (11870192728154).

21001110211222 is a wasteful number, since it uses less digits than its factorization.

21001110211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456545874182.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21001110211222 its reverse (22211201110012), we get a palindrome (43212311321234).

The spelling of 21001110211222 in words is "twenty-one trillion, one billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-two".