1121023213 has 8 divisors (see below), whose sum is σ = 1125597600. Its totient is φ = 1116459120.

The previous prime is 1121023171. The next prime is 1121023261. The reversal of 1121023213 is 3123201211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121023213 - 2⁹ = 1121022701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121023283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271438 + ... + 275536.

It is an arithmetic number, because the mean of its divisors is an integer number (140699700).

Almost surely, 2^1121023213 is an apocalyptic number.

It is an amenable number.

1121023213 is a deficient number, since it is larger than the sum of its proper divisors (4574387).

1121023213 is an equidigital number, since it uses as much as digits as its factorization.

1121023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1121023213 is about 33481.6847395707. The cubic root of 1121023213 is about 1038.8149757467.

Adding to 1121023213 its reverse (3123201211), we get a palindrome (4244224424).

The spelling of 1121023213 in words is "one billion, one hundred twenty-one million, twenty-three thousand, two hundred thirteen".