21022212101201 has 4 divisors (see below), whose sum is σ = 21035293753152. Its totient is φ = 21009130449252.

The previous prime is 21022212101167. The next prime is 21022212101203. The reversal of 21022212101201 is 10210121222012.

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 a cyclic number.

It is not a de Polignac number, because 21022212101201 - 2³⁴ = 21005032232017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022212101201.

It is not an unprimeable number, because it can be changed into a prime (21022212101203) 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, 6540823565 + ... + 6540826778.

It is an arithmetic number, because the mean of its divisors is an integer number (5258823438288).

Almost surely, 2^{21022212101201} is an apocalyptic number.

It is an amenable number.

21022212101201 is a deficient number, since it is larger than the sum of its proper divisors (13081651951).

21022212101201 is a wasteful number, since it uses less digits than its factorization.

21022212101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13081651950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022212101201 its reverse (10210121222012), we get a palindrome (31232333323213).

The spelling of 21022212101201 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, one hundred one thousand, two hundred one".