21343140101 has 2 divisors, whose sum is σ = 21343140102. Its totient is φ = 21343140100.

The previous prime is 21343140089. The next prime is 21343140109. The reversal of 21343140101 is 10104134312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19743060100 + 1600080001 = 140510^2 + 40001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21343140101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343140109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671570050 + 10671570051.

It is an arithmetic number, because the mean of its divisors is an integer number (10671570051).

Almost surely, 2^21343140101 is an apocalyptic number.

It is an amenable number.

21343140101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343140101 is an equidigital number, since it uses as much as digits as its factorization.

21343140101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21343140101 its reverse (10104134312), we get a palindrome (31447274413).

The spelling of 21343140101 in words is "twenty-one billion, three hundred forty-three million, one hundred forty thousand, one hundred one".