1013121121 has 4 divisors (see below), whose sum is σ = 1019336752. Its totient is φ = 1006905492.

The previous prime is 1013121113. The next prime is 1013121163. The reversal of 1013121121 is 1211213101.

It is a happy number.

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 1013121121 - 2³ = 1013121113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013128121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3107571 + ... + 3107896.

It is an arithmetic number, because the mean of its divisors is an integer number (254834188).

Almost surely, 2^1013121121 is an apocalyptic number.

It is an amenable number.

1013121121 is a deficient number, since it is larger than the sum of its proper divisors (6215631).

1013121121 is an equidigital number, since it uses as much as digits as its factorization.

1013121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6215630.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1013121121 is about 31829.5636319444. The cubic root of 1013121121 is about 1004.3547159223.

Adding to 1013121121 its reverse (1211213101), we get a palindrome (2224334222).

The spelling of 1013121121 in words is "one billion, thirteen million, one hundred twenty-one thousand, one hundred twenty-one".