1012089121 has 2 divisors, whose sum is σ = 1012089122. Its totient is φ = 1012089120.

The previous prime is 1012089119. The next prime is 1012089149. The reversal of 1012089121 is 1219802101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598536225 + 413552896 = 24465^2 + 20336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012089121 - 2¹ = 1012089119 is a prime.

Together with 1012089119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1012089191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506044560 + 506044561.

It is an arithmetic number, because the mean of its divisors is an integer number (506044561).

Almost surely, 2^1012089121 is an apocalyptic number.

It is an amenable number.

1012089121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012089121 is an equidigital number, since it uses as much as digits as its factorization.

1012089121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 1012089121 is about 31813.3481576523. The cubic root of 1012089121 is about 1004.0135766512.

The spelling of 1012089121 in words is "one billion, twelve million, eighty-nine thousand, one hundred twenty-one".