22122202001221 has 8 divisors (see below), whose sum is σ = 25798486299200. Its totient is φ = 18961887429324.

The previous prime is 22122202001219. The next prime is 22122202001233. The reversal of 22122202001221 is 12210020222122.

It is not a de Polignac number, because 22122202001221 - 2¹ = 22122202001219 is a prime.

It is a super-4 number, since 4×22122202001221⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122202001521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32248107531 + ... + 32248108216.

It is an arithmetic number, because the mean of its divisors is an integer number (3224810787400).

Almost surely, 2^{22122202001221} is an apocalyptic number.

It is an amenable number.

22122202001221 is a deficient number, since it is larger than the sum of its proper divisors (3676284297979).

22122202001221 is an frugal number, since it uses more digits than its factorization.

22122202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64496215768 (or 64496215754 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22122202001221 its reverse (12210020222122), we get a palindrome (34332222223343).

The spelling of 22122202001221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred two million, one thousand, two hundred twenty-one".