2001122671 has 2 divisors, whose sum is σ = 2001122672. Its totient is φ = 2001122670.

The previous prime is 2001122663. The next prime is 2001122677. The reversal of 2001122671 is 1762211002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001122671 - 2³ = 2001122663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001122677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000561335 + 1000561336.

It is an arithmetic number, because the mean of its divisors is an integer number (1000561336).

Almost surely, 2^2001122671 is an apocalyptic number.

2001122671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001122671 is an equidigital number, since it uses as much as digits as its factorization.

2001122671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2001122671 is about 44733.9096324030. The cubic root of 2001122671 is about 1260.1567519352.

Adding to 2001122671 its reverse (1762211002), we get a palindrome (3763333673).

The spelling of 2001122671 in words is "two billion, one million, one hundred twenty-two thousand, six hundred seventy-one".