21222211000120 has 64 divisors (see below), whose sum is σ = 52073974512000. Its totient is φ = 7736704754688.

The previous prime is 21222211000103. The next prime is 21222211000153. The reversal of 21222211000120 is 2100011222212.

It is a happy number.

It is a super-2 number, since 2×21222211000120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21222211000094 and 21222211000103.

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, 258262365 + ... + 258344524.

It is an arithmetic number, because the mean of its divisors is an integer number (813655851750).

Almost surely, 2^{21222211000120} is an apocalyptic number.

21222211000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222211000120 is an abundant number, since it is smaller than the sum of its proper divisors (30851763511880).

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

21222211000120 is a wasteful number, since it uses less digits than its factorization.

21222211000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516606992 (or 516606988 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222211000120 its reverse (2100011222212), we get a palindrome (23322222222332).

The spelling of 21222211000120 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty", and thus it is an aban number.