21211122102222 has 48 divisors (see below), whose sum is σ = 47004804050688. Its totient is φ = 6374720046240.

The previous prime is 21211122102199. The next prime is 21211122102259. The reversal of 21211122102222 is 22220122111212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243192054 + ... + 243279257.

It is an arithmetic number, because the mean of its divisors is an integer number (979266751056).

Almost surely, 2^{21211122102222} is an apocalyptic number.

21211122102222 is an abundant number, since it is smaller than the sum of its proper divisors (25793681948466).

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

21211122102222 is a wasteful number, since it uses less digits than its factorization.

21211122102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486471385 (or 486471372 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21211122102222 its reverse (22220122111212), we get a palindrome (43431244213434).

The spelling of 21211122102222 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred two thousand, two hundred twenty-two".