21222445045 has 8 divisors (see below), whose sum is σ = 25581136896. Its totient is φ = 16901820816.

The previous prime is 21222445043. The next prime is 21222445061. The reversal of 21222445045 is 54054422212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222445045 - 2¹ = 21222445043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222444998 and 21222445016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222445043) 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, 9515677 + ... + 9517906.

It is an arithmetic number, because the mean of its divisors is an integer number (3197642112).

Almost surely, 2^21222445045 is an apocalyptic number.

It is an amenable number.

21222445045 is a deficient number, since it is larger than the sum of its proper divisors (4358691851).

21222445045 is a wasteful number, since it uses less digits than its factorization.

21222445045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19033811.

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 21222445045 its reverse (54054422212), we get a palindrome (75276867257).

The spelling of 21222445045 in words is "twenty-one billion, two hundred twenty-two million, four hundred forty-five thousand, forty-five".