1018884121 has 2 divisors, whose sum is σ = 1018884122. Its totient is φ = 1018884120.

The previous prime is 1018884089. The next prime is 1018884131. The reversal of 1018884121 is 1214888101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927872521 + 91011600 = 30461^2 + 9540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018884121 - 2⁵ = 1018884089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1018884131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509442060 + 509442061.

It is an arithmetic number, because the mean of its divisors is an integer number (509442061).

Almost surely, 2^1018884121 is an apocalyptic number.

It is an amenable number.

1018884121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018884121 is an equidigital number, since it uses as much as digits as its factorization.

1018884121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 34.

The square root of 1018884121 is about 31919.9643013585. The cubic root of 1018884121 is about 1006.2554941973.

The spelling of 1018884121 in words is "one billion, eighteen million, eight hundred eighty-four thousand, one hundred twenty-one".