1200221022 has 192 divisors, whose sum is σ = 3341947392. Its totient is φ = 279417600.

The previous prime is 1200220951. The next prime is 1200221023. The reversal of 1200221022 is 2201220021.

It is a junction number, because it is equal to n+sod(n) for n = 1200220989 and 1200221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2444197 + ... + 2444687.

It is an arithmetic number, because the mean of its divisors is an integer number (17405976).

Almost surely, 2^1200221022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670973696).

1200221022 is an abundant number, since it is smaller than the sum of its proper divisors (2141726370).

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

1200221022 is a wasteful number, since it uses less digits than its factorization.

1200221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1200221022 is about 34644.2061822753. The cubic root of 1200221022 is about 1062.7238071003.

Adding to 1200221022 its reverse (2201220021), we get a palindrome (3401441043).

It can be divided in two parts, 1200 and 221022, that added together give a palindrome (222222).

The spelling of 1200221022 in words is "one billion, two hundred million, two hundred twenty-one thousand, twenty-two".