21995030141017 has 2 divisors, whose sum is σ = 21995030141018. Its totient is φ = 21995030141016.

The previous prime is 21995030140999. The next prime is 21995030141053. The reversal of 21995030141017 is 71014103059912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16074037451536 + 5920992689481 = 4009244^2 + 2433309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21995030141017 is a prime.

It is not a weakly prime, because it can be changed into another prime (21995070141017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10997515070508 + 10997515070509.

It is an arithmetic number, because the mean of its divisors is an integer number (10997515070509).

Almost surely, 2^{21995030141017} is an apocalyptic number.

It is an amenable number.

21995030141017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21995030141017 is an equidigital number, since it uses as much as digits as its factorization.

21995030141017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 21995030141017 in words is "twenty-one trillion, nine hundred ninety-five billion, thirty million, one hundred forty-one thousand, seventeen".