1213223013 has 6 divisors (see below), whose sum is σ = 1752433254. Its totient is φ = 808815336.

The previous prime is 1213222949. The next prime is 1213223029. The reversal of 1213223013 is 3103223121.

It can be written as a sum of positive squares in only one way, i.e., 1206659169 + 6563844 = 34737^2 + 2562^2 .

It is not a de Polignac number, because 1213223013 - 2⁶ = 1213222949 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 (1213223813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67401270 + ... + 67401287.

It is an arithmetic number, because the mean of its divisors is an integer number (292072209).

Almost surely, 2^1213223013 is an apocalyptic number.

It is an amenable number.

1213223013 is a deficient number, since it is larger than the sum of its proper divisors (539210241).

1213223013 is a wasteful number, since it uses less digits than its factorization.

1213223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134802563 (or 134802560 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213223013 is about 34831.3510073899. The cubic root of 1213223013 is about 1066.5475273944.

Adding to 1213223013 its reverse (3103223121), we get a palindrome (4316446134).

The spelling of 1213223013 in words is "one billion, two hundred thirteen million, two hundred twenty-three thousand, thirteen".