21201331141 has 2 divisors, whose sum is σ = 21201331142. Its totient is φ = 21201331140.

The previous prime is 21201331111. The next prime is 21201331211. The reversal of 21201331141 is 14113310212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19362722500 + 1838608641 = 139150^2 + 42879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201331141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201331111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600665570 + 10600665571.

It is an arithmetic number, because the mean of its divisors is an integer number (10600665571).

Almost surely, 2^21201331141 is an apocalyptic number.

It is an amenable number.

21201331141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201331141 is an equidigital number, since it uses as much as digits as its factorization.

21201331141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21201331141 its reverse (14113310212), we get a palindrome (35314641353).

The spelling of 21201331141 in words is "twenty-one billion, two hundred one million, three hundred thirty-one thousand, one hundred forty-one".