1201303121 has 4 divisors (see below), whose sum is σ = 1205166144. Its totient is φ = 1197440100.

The previous prime is 1201303093. The next prime is 1201303123. The reversal of 1201303121 is 1213031021.

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: 1213031021 = 269 ⋅4509409.

It is a cyclic number.

It is not a de Polignac number, because 1201303121 - 2⁶ = 1201303057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201303096 and 1201303105.

It is not an unprimeable number, because it can be changed into a prime (1201303123) 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, 1931045 + ... + 1931666.

It is an arithmetic number, because the mean of its divisors is an integer number (301291536).

Almost surely, 2^1201303121 is an apocalyptic number.

It is an amenable number.

1201303121 is a deficient number, since it is larger than the sum of its proper divisors (3863023).

1201303121 is an equidigital number, since it uses as much as digits as its factorization.

1201303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863022.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1201303121 is about 34659.8199793363. The cubic root of 1201303121 is about 1063.0430891110.

Adding to 1201303121 its reverse (1213031021), we get a palindrome (2414334142).

The spelling of 1201303121 in words is "one billion, two hundred one million, three hundred three thousand, one hundred twenty-one".