1021112213 has 4 divisors (see below), whose sum is σ = 1113940608. Its totient is φ = 928283820.

The previous prime is 1021112189. The next prime is 1021112221. The reversal of 1021112213 is 3122111201.

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 a de Polignac number, because none of the positive numbers 2^k-1021112213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021112413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46414181 + ... + 46414202.

It is an arithmetic number, because the mean of its divisors is an integer number (278485152).

Almost surely, 2^1021112213 is an apocalyptic number.

It is an amenable number.

1021112213 is a deficient number, since it is larger than the sum of its proper divisors (92828395).

1021112213 is an equidigital number, since it uses as much as digits as its factorization.

1021112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92828394.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1021112213 is about 31954.8464712319. The cubic root of 1021112213 is about 1006.9884521021.

Adding to 1021112213 its reverse (3122111201), we get a palindrome (4143223414).

The spelling of 1021112213 in words is "one billion, twenty-one million, one hundred twelve thousand, two hundred thirteen".