21220002201001 has 16 divisors (see below), whose sum is σ = 21688028002368. Its totient is φ = 20755863057600.

The previous prime is 21220002200951. The next prime is 21220002201031. The reversal of 21220002201001 is 10010220002212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21220002201001 - 2²³ = 21219993812393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220002201031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426190830 + ... + 426240616.

It is an arithmetic number, because the mean of its divisors is an integer number (1355501750148).

Almost surely, 2^{21220002201001} is an apocalyptic number.

It is an amenable number.

21220002201001 is a deficient number, since it is larger than the sum of its proper divisors (468025801367).

21220002201001 is a wasteful number, since it uses less digits than its factorization.

21220002201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88632.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220002201001 its reverse (10010220002212), we get a palindrome (31230222203213).

The spelling of 21220002201001 in words is "twenty-one trillion, two hundred twenty billion, two million, two hundred one thousand, one".