1024013021 has 4 divisors (see below), whose sum is σ = 1025512992. Its totient is φ = 1022513052.

The previous prime is 1024013009. The next prime is 1024013033. The reversal of 1024013021 is 1203104201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1203104201 = 13 ⋅92546477.

It is an interprime number because it is at equal distance from previous prime (1024013009) and next prime (1024013033).

It is a cyclic number.

It is not a de Polignac number, because 1024013021 - 2¹⁰ = 1024011997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1024012987 and 1024013005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024013821) 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, 748961 + ... + 750326.

It is an arithmetic number, because the mean of its divisors is an integer number (256378248).

Almost surely, 2^1024013021 is an apocalyptic number.

It is an amenable number.

1024013021 is a deficient number, since it is larger than the sum of its proper divisors (1499971).

1024013021 is an equidigital number, since it uses as much as digits as its factorization.

1024013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499970.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1024013021 is about 32000.2034524782. The cubic root of 1024013021 is about 1007.9411121457.

Adding to 1024013021 its reverse (1203104201), we get a palindrome (2227117222).

The spelling of 1024013021 in words is "one billion, twenty-four million, thirteen thousand, twenty-one".