1020320121 has 8 divisors (see below), whose sum is σ = 1432028320. Its totient is φ = 644412672.

The previous prime is 1020320117. The next prime is 1020320131. The reversal of 1020320121 is 1210230201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020320121 - 2² = 1020320117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020320097 and 1020320106.

It is not an unprimeable number, because it can be changed into a prime (1020320101) 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 7 ways as a sum of consecutive naturals, for example, 8950120 + ... + 8950233.

It is an arithmetic number, because the mean of its divisors is an integer number (179003540).

Almost surely, 2^1020320121 is an apocalyptic number.

It is an amenable number.

1020320121 is a deficient number, since it is larger than the sum of its proper divisors (411708199).

1020320121 is a wasteful number, since it uses less digits than its factorization.

1020320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900375.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1020320121 is about 31942.4501408392. The cubic root of 1020320121 is about 1006.7280060840.

Adding to 1020320121 its reverse (1210230201), we get a palindrome (2230550322).

The spelling of 1020320121 in words is "one billion, twenty million, three hundred twenty thousand, one hundred twenty-one".