1121041213 has 4 divisors (see below), whose sum is σ = 1142192988. Its totient is φ = 1099889440.

The previous prime is 1121041193. The next prime is 1121041219. The reversal of 1121041213 is 3121401211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 736959609 + 384081604 = 27147^2 + 19598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121041213 is a prime.

It is a super-2 number, since 2×1121041213² = 2513466802489022738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121041219) 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, 10575808 + ... + 10575913.

It is an arithmetic number, because the mean of its divisors is an integer number (285548247).

Almost surely, 2^1121041213 is an apocalyptic number.

It is an amenable number.

1121041213 is a deficient number, since it is larger than the sum of its proper divisors (21151775).

1121041213 is an equidigital number, since it uses as much as digits as its factorization.

1121041213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21151774.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1121041213 is about 33481.9535421695. The cubic root of 1121041213 is about 1038.8205357176.

Adding to 1121041213 its reverse (3121401211), we get a palindrome (4242442424).

The spelling of 1121041213 in words is "one billion, one hundred twenty-one million, forty-one thousand, two hundred thirteen".