2011521167 has 2 divisors, whose sum is σ = 2011521168. Its totient is φ = 2011521166.

The previous prime is 2011521121. The next prime is 2011521173. The reversal of 2011521167 is 7611251102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011521167 - 2¹⁸ = 2011259023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011521767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005760583 + 1005760584.

It is an arithmetic number, because the mean of its divisors is an integer number (1005760584).

Almost surely, 2^2011521167 is an apocalyptic number.

2011521167 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011521167 is an equidigital number, since it uses as much as digits as its factorization.

2011521167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 2011521167 is about 44849.9851393509. The cubic root of 2011521167 is about 1262.3357126616.

Adding to 2011521167 its reverse (7611251102), we get a palindrome (9622772269).

The spelling of 2011521167 in words is "two billion, eleven million, five hundred twenty-one thousand, one hundred sixty-seven".