1301123121 has 4 divisors (see below), whose sum is σ = 1734830832. Its totient is φ = 867415412.

The previous prime is 1301123119. The next prime is 1301123123. The reversal of 1301123121 is 1213211031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1213211031 = 3 ⋅404403677.

It is an interprime number because it is at equal distance from previous prime (1301123119) and next prime (1301123123).

It is a cyclic number.

It is not a de Polignac number, because 1301123121 - 2¹ = 1301123119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1301123121.

It is not an unprimeable number, because it can be changed into a prime (1301123123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216853851 + ... + 216853856.

It is an arithmetic number, because the mean of its divisors is an integer number (433707708).

Almost surely, 2^1301123121 is an apocalyptic number.

It is an amenable number.

1301123121 is a deficient number, since it is larger than the sum of its proper divisors (433707711).

1301123121 is an equidigital number, since it uses as much as digits as its factorization.

1301123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433707710.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1301123121 is about 36071.0842781306. The cubic root of 1301123121 is about 1091.7070916354.

Adding to 1301123121 its reverse (1213211031), we get a palindrome (2514334152).

The spelling of 1301123121 in words is "one billion, three hundred one million, one hundred twenty-three thousand, one hundred twenty-one".