10201022211221 has 4 divisors (see below), whose sum is σ = 10202762708844. Its totient is φ = 10199281713600.

The previous prime is 10201022211203. The next prime is 10201022211223. The reversal of 10201022211221 is 12211222010201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2432320968100 + 7768701243121 = 1559590^2 + 2787239^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201022211221 - 2⁶ = 10201022211157 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 10201022211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201022211223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870240020 + ... + 870251741.

It is an arithmetic number, because the mean of its divisors is an integer number (2550690677211).

Almost surely, 2^{10201022211221} is an apocalyptic number.

It is an amenable number.

10201022211221 is a deficient number, since it is larger than the sum of its proper divisors (1740497623).

10201022211221 is an equidigital number, since it uses as much as digits as its factorization.

10201022211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740497622.

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

Adding to 10201022211221 its reverse (12211222010201), we get a palindrome (22412244221422).

It can be divided in two parts, 1020102 and 2211221, that added together give a palindrome (3231323).

The spelling of 10201022211221 in words is "ten trillion, two hundred one billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".