21226604601 has 4 divisors (see below), whose sum is σ = 28302139472. Its totient is φ = 14151069732.

The previous prime is 21226604593. The next prime is 21226604603. The reversal of 21226604601 is 10640662212.

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 not a de Polignac number, because 21226604601 - 2³ = 21226604593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21226604603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537767431 + ... + 3537767436.

It is an arithmetic number, because the mean of its divisors is an integer number (7075534868).

Almost surely, 2^21226604601 is an apocalyptic number.

It is an amenable number.

21226604601 is a deficient number, since it is larger than the sum of its proper divisors (7075534871).

21226604601 is an equidigital number, since it uses as much as digits as its factorization.

21226604601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075534870.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 21226604601 in words is "twenty-one billion, two hundred twenty-six million, six hundred four thousand, six hundred one".