22100101221221 has 4 divisors (see below), whose sum is σ = 22100248135392. Its totient is φ = 22099954307052.

The previous prime is 22100101221199. The next prime is 22100101221277. The reversal of 22100101221221 is 12212210100122.

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 22100101221221 - 2⁶ = 22100101221157 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 22100101221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100101221721) 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, 73231211 + ... + 73532376.

It is an arithmetic number, because the mean of its divisors is an integer number (5525062033848).

Almost surely, 2^{22100101221221} is an apocalyptic number.

It is an amenable number.

22100101221221 is a deficient number, since it is larger than the sum of its proper divisors (146914171).

22100101221221 is a wasteful number, since it uses less digits than its factorization.

22100101221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146914170.

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

Adding to 22100101221221 its reverse (12212210100122), we get a palindrome (34312311321343).

The spelling of 22100101221221 in words is "twenty-two trillion, one hundred billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".