1013115421 has 4 divisors (see below), whose sum is σ = 1014479712. Its totient is φ = 1011751132.

The previous prime is 1013115419. The next prime is 1013115437. The reversal of 1013115421 is 1245113101.

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.

It is a cyclic number.

It is not a de Polignac number, because 1013115421 - 2¹ = 1013115419 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 (1013115451) 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, 681031 + ... + 682516.

It is an arithmetic number, because the mean of its divisors is an integer number (253619928).

Almost surely, 2^1013115421 is an apocalyptic number.

It is an amenable number.

1013115421 is a deficient number, since it is larger than the sum of its proper divisors (1364291).

1013115421 is an equidigital number, since it uses as much as digits as its factorization.

1013115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364290.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1013115421 is about 31829.4740924194. The cubic root of 1013115421 is about 1004.3528323592.

Adding to 1013115421 its reverse (1245113101), we get a palindrome (2258228522).

It can be divided in two parts, 10131 and 15421, that added together give a palindrome (25552).

The spelling of 1013115421 in words is "one billion, thirteen million, one hundred fifteen thousand, four hundred twenty-one".