21226357041 has 4 divisors (see below), whose sum is σ = 28301809392. Its totient is φ = 14150904692.

The previous prime is 21226357039. The next prime is 21226357043. The reversal of 21226357041 is 14075362212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21226357039) and next prime (21226357043).

It is a cyclic number.

It is not a de Polignac number, because 21226357041 - 2¹ = 21226357039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21226356993 and 21226357011.

It is not an unprimeable number, because it can be changed into a prime (21226357043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537726171 + ... + 3537726176.

It is an arithmetic number, because the mean of its divisors is an integer number (7075452348).

Almost surely, 2^21226357041 is an apocalyptic number.

It is an amenable number.

21226357041 is a deficient number, since it is larger than the sum of its proper divisors (7075452351).

21226357041 is an equidigital number, since it uses as much as digits as its factorization.

21226357041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075452350.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21226357041 in words is "twenty-one billion, two hundred twenty-six million, three hundred fifty-seven thousand, forty-one".