222121411220 has 24 divisors (see below), whose sum is σ = 468546699264. Its totient is φ = 88450138656.

The previous prime is 222121411217. The next prime is 222121411247. The reversal of 222121411220 is 22114121222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222121411192 and 222121411201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24897044 + ... + 24905963.

It is an arithmetic number, because the mean of its divisors is an integer number (19522779136).

Almost surely, 2^222121411220 is an apocalyptic number.

222121411220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121411220 is an abundant number, since it is smaller than the sum of its proper divisors (246425288044).

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

222121411220 is a wasteful number, since it uses less digits than its factorization.

222121411220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49803239 (or 49803237 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222121411220 its reverse (22114121222), we get a palindrome (244235532442).

The spelling of 222121411220 in words is "two hundred twenty-two billion, one hundred twenty-one million, four hundred eleven thousand, two hundred twenty".