2091012121 has 8 divisors (see below), whose sum is σ = 2415286944. Its totient is φ = 1789101120.

The previous prime is 2091012071. The next prime is 2091012137. The reversal of 2091012121 is 1212101902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2091012121 - 2¹¹ = 2091010073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091012181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5590755 + ... + 5591128.

It is an arithmetic number, because the mean of its divisors is an integer number (301910868).

Almost surely, 2^2091012121 is an apocalyptic number.

It is an amenable number.

2091012121 is a deficient number, since it is larger than the sum of its proper divisors (324274823).

2091012121 is a wasteful number, since it uses less digits than its factorization.

2091012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181911.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 2091012121 is about 45727.5859957641. The cubic root of 2091012121 is about 1278.7496173668.

The spelling of 2091012121 in words is "two billion, ninety-one million, twelve thousand, one hundred twenty-one".