1023130021 has 8 divisors (see below), whose sum is σ = 1029937664. Its totient is φ = 1016342640.

The previous prime is 1023130019. The next prime is 1023130037. The reversal of 1023130021 is 1200313201.

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

It is a cyclic number.

It is not a de Polignac number, because 1023130021 - 2¹ = 1023130019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023129983 and 1023130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023130001) 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, 103891 + ... + 113311.

It is an arithmetic number, because the mean of its divisors is an integer number (128742208).

Almost surely, 2^1023130021 is an apocalyptic number.

It is an amenable number.

1023130021 is a deficient number, since it is larger than the sum of its proper divisors (6807643).

1023130021 is an equidigital number, since it uses as much as digits as its factorization.

1023130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10131.

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

The square root of 1023130021 is about 31986.4036896929. The cubic root of 1023130021 is about 1007.6513150684.

Adding to 1023130021 its reverse (1200313201), we get a palindrome (2223443222).

It can be divided in two parts, 1023 and 130021, that added together give a square (131044 = 362²).

The spelling of 1023130021 in words is "one billion, twenty-three million, one hundred thirty thousand, twenty-one".