21121110201222 has 32 divisors (see below), whose sum is σ = 46962667171200. Its totient is φ = 7036340058504.

The previous prime is 21121110201211. The next prime is 21121110201239. The reversal of 21121110201222 is 22210201112112.

21121110201222 is a `hidden beast` number, since 21 + 1 + 211 + 10 + 201 + 222 = 666.

It is a super-2 number, since 2×21121110201222² (a number of 27 digits) contains 22 as substring.

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 = 21121110201195 and 21121110201204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111849472 + ... + 112038147.

It is an arithmetic number, because the mean of its divisors is an integer number (1467583349100).

Almost surely, 2^{21121110201222} is an apocalyptic number.

21121110201222 is an abundant number, since it is smaller than the sum of its proper divisors (25841556969978).

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

21121110201222 is a wasteful number, since it uses less digits than its factorization.

21121110201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223889377 (or 223889371 counting only the distinct ones).

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

Adding to 21121110201222 its reverse (22210201112112), we get a palindrome (43331311313334).

The spelling of 21121110201222 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred one thousand, two hundred twenty-two".