1013421121 has 4 divisors (see below), whose sum is σ = 1030034644. Its totient is φ = 996807600.

The previous prime is 1013421089. The next prime is 1013421131. The reversal of 1013421121 is 1211243101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 330330625 + 683090496 = 18175^2 + 26136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013421121 - 2⁵ = 1013421089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013421095 and 1013421104.

It is not an unprimeable number, because it can be changed into a prime (1013421131) 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, 8306670 + ... + 8306791.

It is an arithmetic number, because the mean of its divisors is an integer number (257508661).

Almost surely, 2^1013421121 is an apocalyptic number.

It is an amenable number.

1013421121 is a deficient number, since it is larger than the sum of its proper divisors (16613523).

1013421121 is an equidigital number, since it uses as much as digits as its factorization.

1013421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16613522.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1013421121 is about 31834.2758830792. The cubic root of 1013421121 is about 1004.4538408518.

Adding to 1013421121 its reverse (1211243101), we get a palindrome (2224664222).

The spelling of 1013421121 in words is "one billion, thirteen million, four hundred twenty-one thousand, one hundred twenty-one".