1021200222 has 64 divisors (see below), whose sum is σ = 2406104064. Its totient is φ = 282839040.

The previous prime is 1021200209. The next prime is 1021200241. The reversal of 1021200222 is 2220021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021200198 and 1021200207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482238 + ... + 484350.

It is an arithmetic number, because the mean of its divisors is an integer number (37595376).

Almost surely, 2^1021200222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021200222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1203052032).

1021200222 is an abundant number, since it is smaller than the sum of its proper divisors (1384903842).

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

1021200222 is a wasteful number, since it uses less digits than its factorization.

1021200222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

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

The square root of 1021200222 is about 31956.2235253166. The cubic root of 1021200222 is about 1007.0173818317.

Adding to 1021200222 its reverse (2220021201), we get a palindrome (3241221423).

The spelling of 1021200222 in words is "one billion, twenty-one million, two hundred thousand, two hundred twenty-two".