1042211221 has 4 divisors (see below), whose sum is σ = 1042930944. Its totient is φ = 1041491500.

The previous prime is 1042211171. The next prime is 1042211243. The reversal of 1042211221 is 1221122401.

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.

It is a cyclic number.

It is not a de Polignac number, because 1042211221 - 2¹¹ = 1042209173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042211195 and 1042211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042211281) 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, 357685 + ... + 360586.

It is an arithmetic number, because the mean of its divisors is an integer number (260732736).

Almost surely, 2^1042211221 is an apocalyptic number.

It is an amenable number.

1042211221 is a deficient number, since it is larger than the sum of its proper divisors (719723).

1042211221 is an equidigital number, since it uses as much as digits as its factorization.

1042211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719722.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1042211221 is about 32283.2963155871. The cubic root of 1042211221 is about 1013.8769465937.

Adding to 1042211221 its reverse (1221122401), we get a palindrome (2263333622).

The spelling of 1042211221 in words is "one billion, forty-two million, two hundred eleven thousand, two hundred twenty-one".