21190158464941 has 2 divisors, whose sum is σ = 21190158464942. Its totient is φ = 21190158464940.

The previous prime is 21190158464903. The next prime is 21190158464947. The reversal of 21190158464941 is 14946485109112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21187562970025 + 2595494916 = 4602995^2 + 50946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21190158464941 is a prime.

It is a super-2 number, since 2×21190158464941² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21190158464947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10595079232470 + 10595079232471.

It is an arithmetic number, because the mean of its divisors is an integer number (10595079232471).

Almost surely, 2^{21190158464941} is an apocalyptic number.

It is an amenable number.

21190158464941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21190158464941 is an equidigital number, since it uses as much as digits as its factorization.

21190158464941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 21190158464941 in words is "twenty-one trillion, one hundred ninety billion, one hundred fifty-eight million, four hundred sixty-four thousand, nine hundred forty-one".