222121443120 has 160 divisors (see below), whose sum is σ = 695880675072. Its totient is φ = 58607318016.

The previous prime is 222121443119. The next prime is 222121443121. The reversal of 222121443120 is 21344121222.

It is an interprime number because it is at equal distance from previous prime (222121443119) and next prime (222121443121).

It is a super-2 number, since 2×222121443120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (222121443121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8867734 + ... + 8892746.

Almost surely, 2^222121443120 is an apocalyptic number.

222121443120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222121443120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347940337536).

222121443120 is an abundant number, since it is smaller than the sum of its proper divisors (473759231952).

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

222121443120 is a wasteful number, since it uses less digits than its factorization.

222121443120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25419 (or 25413 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 222121443120 its reverse (21344121222), we get a palindrome (243465564342).

The spelling of 222121443120 in words is "two hundred twenty-two billion, one hundred twenty-one million, four hundred forty-three thousand, one hundred twenty".