1021132213 has 4 divisors (see below), whose sum is σ = 1021201920. Its totient is φ = 1021062508.

The previous prime is 1021132207. The next prime is 1021132237. The reversal of 1021132213 is 3122311201.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021132213 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 (1021132243) 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, 3445 + ... + 45322.

It is an arithmetic number, because the mean of its divisors is an integer number (255300480).

Almost surely, 2^1021132213 is an apocalyptic number.

It is an amenable number.

1021132213 is a deficient number, since it is larger than the sum of its proper divisors (69707).

1021132213 is an equidigital number, since it uses as much as digits as its factorization.

1021132213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69706.

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

The square root of 1021132213 is about 31955.1594112750. The cubic root of 1021132213 is about 1006.9950265143.

Adding to 1021132213 its reverse (3122311201), we get a palindrome (4143443414).

It can be divided in two parts, 10211 and 32213, that added together give a palindrome (42424).

The spelling of 1021132213 in words is "one billion, twenty-one million, one hundred thirty-two thousand, two hundred thirteen".