21001504141 has 2 divisors, whose sum is σ = 21001504142. Its totient is φ = 21001504140.

The previous prime is 21001504109. The next prime is 21001504201. The reversal of 21001504141 is 14140510012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14070941641 + 6930562500 = 118621^2 + 83250^2 .

It is a cyclic number.

It is not a de Polignac number, because 21001504141 - 2⁵ = 21001504109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001504541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500752070 + 10500752071.

It is an arithmetic number, because the mean of its divisors is an integer number (10500752071).

Almost surely, 2^21001504141 is an apocalyptic number.

It is an amenable number.

21001504141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001504141 is an equidigital number, since it uses as much as digits as its factorization.

21001504141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The spelling of 21001504141 in words is "twenty-one billion, one million, five hundred four thousand, one hundred forty-one".