2921116081 has 32 divisors (see below), whose sum is σ = 3427522560. Its totient is φ = 2467238400.

The previous prime is 2921116073. The next prime is 2921116109. The reversal of 2921116081 is 1806111292.

It is a happy number.

2921116081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2921116081 - 2³ = 2921116073 is a prime.

It is a super-2 number, since 2×2921116081² = 17065838317353597122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (2921116061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823171 + ... + 826711.

It is an arithmetic number, because the mean of its divisors is an integer number (107110080).

Almost surely, 2^2921116081 is an apocalyptic number.

It is an amenable number.

2921116081 is a deficient number, since it is larger than the sum of its proper divisors (506406479).

2921116081 is a wasteful number, since it uses less digits than its factorization.

2921116081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 2921116081 is about 54047.3503605866. The cubic root of 2921116081 is about 1429.4959804579.

The spelling of 2921116081 in words is "two billion, nine hundred twenty-one million, one hundred sixteen thousand, eighty-one".