22101002012221 has 4 divisors (see below), whose sum is σ = 24110184013344. Its totient is φ = 20091820011100.

The previous prime is 22101002012209. The next prime is 22101002012261. The reversal of 22101002012221 is 12221020010122.

It is a happy number.

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 22101002012221 - 2²¹ = 22100999915069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22101002012195 and 22101002012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101002012261) 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, 1004591000545 + ... + 1004591000566.

It is an arithmetic number, because the mean of its divisors is an integer number (6027546003336).

Almost surely, 2^{22101002012221} is an apocalyptic number.

It is an amenable number.

22101002012221 is a deficient number, since it is larger than the sum of its proper divisors (2009182001123).

22101002012221 is a wasteful number, since it uses less digits than its factorization.

22101002012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009182001122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22101002012221 its reverse (12221020010122), we get a palindrome (34322022022343).

The spelling of 22101002012221 in words is "twenty-two trillion, one hundred one billion, two million, twelve thousand, two hundred twenty-one".