21910219141 has 2 divisors, whose sum is σ = 21910219142. Its totient is φ = 21910219140.

The previous prime is 21910219087. The next prime is 21910219169. The reversal of 21910219141 is 14191201912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19340743041 + 2569476100 = 139071^2 + 50690^2 .

It is a cyclic number.

It is not a de Polignac number, because 21910219141 - 2⁷ = 21910219013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21910219241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10955109570 + 10955109571.

It is an arithmetic number, because the mean of its divisors is an integer number (10955109571).

Almost surely, 2^21910219141 is an apocalyptic number.

It is an amenable number.

21910219141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21910219141 is an equidigital number, since it uses as much as digits as its factorization.

21910219141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21910219141 in words is "twenty-one billion, nine hundred ten million, two hundred nineteen thousand, one hundred forty-one".