2011901851 has 2 divisors, whose sum is σ = 2011901852. Its totient is φ = 2011901850.

The previous prime is 2011901821. The next prime is 2011901861. The reversal of 2011901851 is 1581091102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011901851 - 2¹¹ = 2011899803 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011901821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005950925 + 1005950926.

It is an arithmetic number, because the mean of its divisors is an integer number (1005950926).

Almost surely, 2^2011901851 is an apocalyptic number.

2011901851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011901851 is an equidigital number, since it uses as much as digits as its factorization.

2011901851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 2011901851 is about 44854.2289087662. The cubic root of 2011901851 is about 1262.4153407402.

Adding to 2011901851 its reverse (1581091102), we get a palindrome (3592992953).

The spelling of 2011901851 in words is "two billion, eleven million, nine hundred one thousand, eight hundred fifty-one".