1016560121 has 4 divisors (see below), whose sum is σ = 1017667200. Its totient is φ = 1015453044.

The previous prime is 1016560117. The next prime is 1016560123. The reversal of 1016560121 is 1210656101.

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.

It is a cyclic number.

It is not a de Polignac number, because 1016560121 - 2² = 1016560117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016560123) 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, 552161 + ... + 553998.

It is an arithmetic number, because the mean of its divisors is an integer number (254416800).

Almost surely, 2^1016560121 is an apocalyptic number.

It is an amenable number.

1016560121 is a deficient number, since it is larger than the sum of its proper divisors (1107079).

1016560121 is an equidigital number, since it uses as much as digits as its factorization.

1016560121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107078.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1016560121 is about 31883.5399697085. The cubic root of 1016560121 is about 1005.4898467641.

The spelling of 1016560121 in words is "one billion, sixteen million, five hundred sixty thousand, one hundred twenty-one".