1230021013 has 8 divisors (see below), whose sum is σ = 1338295448. Its totient is φ = 1123697664.

The previous prime is 1230021011. The next prime is 1230021017. The reversal of 1230021013 is 3101200321.

It can be written as a sum of positive squares in 4 ways, for example, as 94128804 + 1135892209 = 9702^2 + 33703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1230021013 - 2¹ = 1230021011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230020984 and 1230021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486456 + ... + 488977.

It is an arithmetic number, because the mean of its divisors is an integer number (167286931).

Almost surely, 2^1230021013 is an apocalyptic number.

1230021013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1230021013 is a deficient number, since it is larger than the sum of its proper divisors (108274435).

1230021013 is an equidigital number, since it uses as much as digits as its factorization.

1230021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975543.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1230021013 is about 35071.6554071803. The cubic root of 1230021013 is about 1071.4473710640.

Adding to 1230021013 its reverse (3101200321), we get a palindrome (4331221334).

The spelling of 1230021013 in words is "one billion, two hundred thirty million, twenty-one thousand, thirteen".