1023212213 has 4 divisors (see below), whose sum is σ = 1023285228. Its totient is φ = 1023139200.

The previous prime is 1023212209. The next prime is 1023212227. The reversal of 1023212213 is 3122123201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3122123201 = 23 ⋅135744487.

It can be written as a sum of positive squares in 2 ways, for example, as 918211204 + 105001009 = 30302^2 + 10247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023212213 - 2² = 1023212209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023212191 and 1023212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023212233) 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, 8138 + ... + 45963.

It is an arithmetic number, because the mean of its divisors is an integer number (255821307).

Almost surely, 2^1023212213 is an apocalyptic number.

It is an amenable number.

1023212213 is a deficient number, since it is larger than the sum of its proper divisors (73015).

1023212213 is an equidigital number, since it uses as much as digits as its factorization.

1023212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73014.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1023212213 is about 31987.6884597809. The cubic root of 1023212213 is about 1007.6782971910.

Adding to 1023212213 its reverse (3122123201), we get a palindrome (4145335414).

The spelling of 1023212213 in words is "one billion, twenty-three million, two hundred twelve thousand, two hundred thirteen".