1002211121 has 4 divisors (see below), whose sum is σ = 1034540544. Its totient is φ = 969881700.

The previous prime is 1002211103. The next prime is 1002211159. The reversal of 1002211121 is 1211122001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1211122001 = 41 ⋅29539561.

It is a cyclic number.

It is not a de Polignac number, because 1002211121 - 2¹⁴ = 1002194737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16164665 + ... + 16164726.

It is an arithmetic number, because the mean of its divisors is an integer number (258635136).

Almost surely, 2^1002211121 is an apocalyptic number.

It is an amenable number.

1002211121 is a deficient number, since it is larger than the sum of its proper divisors (32329423).

1002211121 is an equidigital number, since it uses as much as digits as its factorization.

1002211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32329422.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1002211121 is about 31657.7181900402. The cubic root of 1002211121 is about 1000.7364977712.

Adding to 1002211121 its reverse (1211122001), we get a palindrome (2213333122).

The spelling of 1002211121 in words is "one billion, two million, two hundred eleven thousand, one hundred twenty-one".