1303121121 has 16 divisors (see below), whose sum is σ = 1752153984. Its totient is φ = 861432704.

The previous prime is 1303121117. The next prime is 1303121159. The reversal of 1303121121 is 1211213031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1303121121 - 2² = 1303121117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1303121121.

It is not an unprimeable number, because it can be changed into a prime (1303121191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659491 + ... + 661463.

It is an arithmetic number, because the mean of its divisors is an integer number (109509624).

Almost surely, 2^1303121121 is an apocalyptic number.

It is an amenable number.

1303121121 is a deficient number, since it is larger than the sum of its proper divisors (449032863).

1303121121 is a wasteful number, since it uses less digits than its factorization.

1303121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720.

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

The square root of 1303121121 is about 36098.7689679302. The cubic root of 1303121121 is about 1092.2656130104.

Adding to 1303121121 its reverse (1211213031), we get a palindrome (2514334152).

It can be divided in two parts, 130 and 3121121, that added together give a triangular number (3121251 = T₂₄₉₈).

The spelling of 1303121121 in words is "one billion, three hundred three million, one hundred twenty-one thousand, one hundred twenty-one".