2021166151 has 2 divisors, whose sum is σ = 2021166152. Its totient is φ = 2021166150.

The previous prime is 2021166113. The next prime is 2021166167. The reversal of 2021166151 is 1516611202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021166151 - 2⁹ = 2021165639 is a prime.

It is a super-2 number, since 2×2021166151² = 8170225219896309602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021166751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010583075 + 1010583076.

It is an arithmetic number, because the mean of its divisors is an integer number (1010583076).

Almost surely, 2^2021166151 is an apocalyptic number.

2021166151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021166151 is an equidigital number, since it uses as much as digits as its factorization.

2021166151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2021166151 is about 44957.3814962571. The cubic root of 2021166151 is about 1264.3500754079.

Adding to 2021166151 its reverse (1516611202), we get a palindrome (3537777353).

The spelling of 2021166151 in words is "two billion, twenty-one million, one hundred sixty-six thousand, one hundred fifty-one".