21211012220022 has 64 divisors (see below), whose sum is σ = 48239820034560. Its totient is φ = 6904756770912.

The previous prime is 21211012220003. The next prime is 21211012220059. The reversal of 21211012220022 is 22002221011212.

It is a happy number.

21211012220022 is a `hidden beast` number, since 212 + 110 + 122 + 200 + 22 = 666.

It is a super-2 number, since 2×21211012220022² (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 = 21211012219977 and 21211012220004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13187908 + ... + 14708600.

It is an arithmetic number, because the mean of its divisors is an integer number (753747188040).

Almost surely, 2^{21211012220022} is an apocalyptic number.

21211012220022 is an abundant number, since it is smaller than the sum of its proper divisors (27028807814538).

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

21211012220022 is a wasteful number, since it uses less digits than its factorization.

21211012220022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526754 (or 1526748 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21211012220022 its reverse (22002221011212), we get a palindrome (43213233231234).

The spelling of 21211012220022 in words is "twenty-one trillion, two hundred eleven billion, twelve million, two hundred twenty thousand, twenty-two".