22010110001221 has 16 divisors (see below), whose sum is σ = 23391687945600. Its totient is φ = 20638212069888.

The previous prime is 22010110001197. The next prime is 22010110001309. The reversal of 22010110001221 is 12210001101022.

It is a cyclic number.

It is not a de Polignac number, because 22010110001221 - 2⁵ = 22010110001189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010110001521) 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, 24621360 + ... + 25499638.

It is an arithmetic number, because the mean of its divisors is an integer number (1461980496600).

Almost surely, 2^{22010110001221} is an apocalyptic number.

It is an amenable number.

22010110001221 is a deficient number, since it is larger than the sum of its proper divisors (1381577944379).

22010110001221 is a wasteful number, since it uses less digits than its factorization.

22010110001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883788.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22010110001221 its reverse (12210001101022), we get a palindrome (34220111102243).

The spelling of 22010110001221 in words is "twenty-two trillion, ten billion, one hundred ten million, one thousand, two hundred twenty-one".