1021211122 has 4 divisors (see below), whose sum is σ = 1531816686. Its totient is φ = 510605560.

The previous prime is 1021211033. The next prime is 1021211129. The reversal of 1021211122 is 2211121201.

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., 910772041 + 110439081 = 30179^2 + 10509^2 .

It is not an unprimeable number, because it can be changed into a prime (1021211129) by changing a digit.

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 as a sum of consecutive naturals, namely, 255302779 + ... + 255302782.

Almost surely, 2^1021211122 is an apocalyptic number.

1021211122 is a deficient number, since it is larger than the sum of its proper divisors (510605564).

1021211122 is an equidigital number, since it uses as much as digits as its factorization.

1021211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510605563.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1021211122 is about 31956.3940706707. The cubic root of 1021211122 is about 1007.0209646911.

Adding to 1021211122 its reverse (2211121201), we get a palindrome (3232332323).

The spelling of 1021211122 in words is "one billion, twenty-one million, two hundred eleven thousand, one hundred twenty-two".