2011900291 has 12 divisors (see below), whose sum is σ = 2128125792. Its totient is φ = 1901736144.

The previous prime is 2011900277. The next prime is 2011900307. The reversal of 2011900291 is 1920091102.

It is a de Polignac number, because none of the positive numbers 2^k-2011900291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011900391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161125 + ... + 173161.

It is an arithmetic number, because the mean of its divisors is an integer number (177343816).

Almost surely, 2^2011900291 is an apocalyptic number.

2011900291 is a deficient number, since it is larger than the sum of its proper divisors (116225501).

2011900291 is a wasteful number, since it uses less digits than its factorization.

2011900291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12538 (or 12519 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 2011900291 is about 44854.2115190982. The cubic root of 2011900291 is about 1262.4150144538.

Adding to 2011900291 its reverse (1920091102), we get a palindrome (3931991393).

The spelling of 2011900291 in words is "two billion, eleven million, nine hundred thousand, two hundred ninety-one".