1021231223 has 4 divisors (see below), whose sum is σ = 1022850288. Its totient is φ = 1019612160.

The previous prime is 1021231217. The next prime is 1021231273. The reversal of 1021231223 is 3221321201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021231223 - 2²² = 1017036919 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 (1021231273) 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, 808586 + ... + 809847.

It is an arithmetic number, because the mean of its divisors is an integer number (255712572).

Almost surely, 2^1021231223 is an apocalyptic number.

1021231223 is a deficient number, since it is larger than the sum of its proper divisors (1619065).

1021231223 is an equidigital number, since it uses as much as digits as its factorization.

1021231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619064.

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

The square root of 1021231223 is about 31956.7085758218. The cubic root of 1021231223 is about 1007.0275718772.

Adding to 1021231223 its reverse (3221321201), we get a palindrome (4242552424).

The spelling of 1021231223 in words is "one billion, twenty-one million, two hundred thirty-one thousand, two hundred twenty-three".