21002011141 has 2 divisors, whose sum is σ = 21002011142. Its totient is φ = 21002011140.

The previous prime is 21002011139. The next prime is 21002011187. The reversal of 21002011141 is 14111020012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14267346916 + 6734664225 = 119446^2 + 82065^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002011141 - 2¹ = 21002011139 is a prime.

Together with 21002011139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002011441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501005570 + 10501005571.

It is an arithmetic number, because the mean of its divisors is an integer number (10501005571).

Almost surely, 2^21002011141 is an apocalyptic number.

It is an amenable number.

21002011141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002011141 is an equidigital number, since it uses as much as digits as its factorization.

21002011141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002011141 its reverse (14111020012), we get a palindrome (35113031153).

The spelling of 21002011141 in words is "twenty-one billion, two million, eleven thousand, one hundred forty-one".