2154301021 has 2 divisors, whose sum is σ = 2154301022. Its totient is φ = 2154301020.

The previous prime is 2154301001. The next prime is 2154301027. The reversal of 2154301021 is 1201034512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114988121 + 39312900 = 45989^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154301021 - 2⁷ = 2154300893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154301021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154301027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077150510 + 1077150511.

It is an arithmetic number, because the mean of its divisors is an integer number (1077150511).

Almost surely, 2^2154301021 is an apocalyptic number.

It is an amenable number.

2154301021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154301021 is an equidigital number, since it uses as much as digits as its factorization.

2154301021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2154301021 is about 46414.4484077965. The cubic root of 2154301021 is about 1291.5229536360.

Adding to 2154301021 its reverse (1201034512), we get a palindrome (3355335533).

The spelling of 2154301021 in words is "two billion, one hundred fifty-four million, three hundred one thousand, twenty-one".