22010201001221 has 4 divisors (see below), whose sum is σ = 22010346590892. Its totient is φ = 22010055411552.

The previous prime is 22010201001199. The next prime is 22010201001223. The reversal of 22010201001221 is 12210010201022.

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 21818147580100 + 192053421121 = 4670990^2 + 438239^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010201001221 - 2³⁴ = 21993021132037 is a prime.

It is a super-2 number, since 2×22010201001221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22010201001196 and 22010201001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010201001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72567830 + ... + 72870503.

It is an arithmetic number, because the mean of its divisors is an integer number (5502586647723).

Almost surely, 2^{22010201001221} is an apocalyptic number.

It is an amenable number.

22010201001221 is a deficient number, since it is larger than the sum of its proper divisors (145589671).

22010201001221 is a wasteful number, since it uses less digits than its factorization.

22010201001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145589670.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22010201001221 its reverse (12210010201022), we get a palindrome (34220211202243).

The spelling of 22010201001221 in words is "twenty-two trillion, ten billion, two hundred one million, one thousand, two hundred twenty-one".