21495269141 has 2 divisors, whose sum is σ = 21495269142. Its totient is φ = 21495269140.

The previous prime is 21495269119. The next prime is 21495269167. The reversal of 21495269141 is 14196259412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12556323025 + 8938946116 = 112055^2 + 94546^2 .

It is a cyclic number.

It is not a de Polignac number, because 21495269141 - 2¹⁰ = 21495268117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21495269092 and 21495269101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21495269111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10747634570 + 10747634571.

It is an arithmetic number, because the mean of its divisors is an integer number (10747634571).

Almost surely, 2^21495269141 is an apocalyptic number.

It is an amenable number.

21495269141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21495269141 is an equidigital number, since it uses as much as digits as its factorization.

21495269141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The spelling of 21495269141 in words is "twenty-one billion, four hundred ninety-five million, two hundred sixty-nine thousand, one hundred forty-one".