8154722162021 has 2 divisors, whose sum is σ = 8154722162022. Its totient is φ = 8154722162020.

The previous prime is 8154722161981. The next prime is 8154722162029. The reversal of 8154722162021 is 1202612274518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7954120293025 + 200601868996 = 2820305^2 + 447886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8154722162021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8154722162021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8154722162029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4077361081010 + 4077361081011.

It is an arithmetic number, because the mean of its divisors is an integer number (4077361081011).

Almost surely, 2^{8154722162021} is an apocalyptic number.

It is an amenable number.

8154722162021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8154722162021 is an equidigital number, since it uses as much as digits as its factorization.

8154722162021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 8154722162021 in words is "eight trillion, one hundred fifty-four billion, seven hundred twenty-two million, one hundred sixty-two thousand, twenty-one".