21210231023141 has 2 divisors, whose sum is σ = 21210231023142. Its totient is φ = 21210231023140.

The previous prime is 21210231023087. The next prime is 21210231023197. The reversal of 21210231023141 is 14132013201212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12651388220641 + 8558842802500 = 3556879^2 + 2925550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210231023141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210231023041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605115511570 + 10605115511571.

It is an arithmetic number, because the mean of its divisors is an integer number (10605115511571).

Almost surely, 2^{21210231023141} is an apocalyptic number.

It is an amenable number.

21210231023141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210231023141 is an equidigital number, since it uses as much as digits as its factorization.

21210231023141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21210231023141 its reverse (14132013201212), we get a palindrome (35342244224353).

The spelling of 21210231023141 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty-one million, twenty-three thousand, one hundred forty-one".