21211102011222 has 32 divisors (see below), whose sum is σ = 47568220629600. Its totient is φ = 7005501579744.

The previous prime is 21211102011181. The next prime is 21211102011269. The reversal of 21211102011222 is 22211020111212.

21211102011222 is a `hidden beast` number, since 21 + 211 + 10 + 201 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21211102011195 and 21211102011204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1801820653 + ... + 1801832424.

It is an arithmetic number, because the mean of its divisors is an integer number (1486506894675).

Almost surely, 2^{21211102011222} is an apocalyptic number.

21211102011222 is an abundant number, since it is smaller than the sum of its proper divisors (26357118618378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211102011222 is a wasteful number, since it uses less digits than its factorization.

21211102011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603653197 (or 3603653191 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21211102011222 its reverse (22211020111212), we get a palindrome (43422122122434).

The spelling of 21211102011222 in words is "twenty-one trillion, two hundred eleven billion, one hundred two million, eleven thousand, two hundred twenty-two".