1000221122 has 4 divisors (see below), whose sum is σ = 1500331686. Its totient is φ = 500110560.

The previous prime is 1000221109. The next prime is 1000221137. The reversal of 1000221122 is 2211220001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 669308641 + 330912481 = 25871^2 + 18191^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250055279 + ... + 250055282.

Almost surely, 2^1000221122 is an apocalyptic number.

1000221122 is a deficient number, since it is larger than the sum of its proper divisors (500110564).

1000221122 is an equidigital number, since it uses as much as digits as its factorization.

1000221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500110563.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1000221122 is about 31626.2726542348. The cubic root of 1000221122 is about 1000.0737019012.

Adding to 1000221122 its reverse (2211220001), we get a palindrome (3211441123).

The spelling of 1000221122 in words is "one billion, two hundred twenty-one thousand, one hundred twenty-two".