21223511241 has 8 divisors (see below), whose sum is σ = 28301258304. Its totient is φ = 14147385840.

The previous prime is 21223511227. The next prime is 21223511251. The reversal of 21223511241 is 14211532212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21223511241 - 2¹¹ = 21223509193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223511201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374541 + ... + 427466.

It is an arithmetic number, because the mean of its divisors is an integer number (3537657288).

Almost surely, 2^21223511241 is an apocalyptic number.

It is an amenable number.

21223511241 is a deficient number, since it is larger than the sum of its proper divisors (7077747063).

21223511241 is an equidigital number, since it uses as much as digits as its factorization.

21223511241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810831.

The product of its digits is 960, while the sum is 24.

The spelling of 21223511241 in words is "twenty-one billion, two hundred twenty-three million, five hundred eleven thousand, two hundred forty-one".