1031320121 has 16 divisors (see below), whose sum is σ = 1148528640. Its totient is φ = 919632960.

The previous prime is 1031320117. The next prime is 1031320139. The reversal of 1031320121 is 1210231301.

It is not a de Polignac number, because 1031320121 - 2² = 1031320117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031320096 and 1031320105.

It is not an unprimeable number, because it can be changed into a prime (1031320111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261200 + ... + 265118.

It is an arithmetic number, because the mean of its divisors is an integer number (71783040).

Almost surely, 2^1031320121 is an apocalyptic number.

It is an amenable number.

1031320121 is a deficient number, since it is larger than the sum of its proper divisors (117208519).

1031320121 is a wasteful number, since it uses less digits than its factorization.

1031320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616.

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

The square root of 1031320121 is about 32114.1732105935. The cubic root of 1031320121 is about 1010.3329036904.

Adding to 1031320121 its reverse (1210231301), we get a palindrome (2241551422).

The spelling of 1031320121 in words is "one billion, thirty-one million, three hundred twenty thousand, one hundred twenty-one".