21445002042201 has 12 divisors (see below), whose sum is σ = 30976199193940. Its totient is φ = 14296628736000.

The previous prime is 21445002042179. The next prime is 21445002042253. The reversal of 21445002042201 is 10224020054412.

It is a happy number.

21445002042201 is a `hidden beast` number, since 2 + 1 + 4 + 450 + 0 + 2 + 0 + 4 + 2 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18702338144400 + 2742663897801 = 4324620^2 + 1656099^2 .

It is not a de Polignac number, because 21445002042201 - 2⁵ = 21445002042169 is a prime.

It is a super-2 number, since 2×21445002042201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21445002042301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399201 + ... + 6561201.

Almost surely, 2^{21445002042201} is an apocalyptic number.

It is an amenable number.

21445002042201 is a deficient number, since it is larger than the sum of its proper divisors (9531197151739).

21445002042201 is a wasteful number, since it uses less digits than its factorization.

21445002042201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6548696 (or 6548693 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21445002042201 its reverse (10224020054412), we get a palindrome (31669022096613).

The spelling of 21445002042201 in words is "twenty-one trillion, four hundred forty-five billion, two million, forty-two thousand, two hundred one".