22012201222221 has 32 divisors (see below), whose sum is σ = 35518003642368. Its totient is φ = 11837655002880.

The previous prime is 22012201222213. The next prime is 22012201222267. The reversal of 22012201222221 is 12222210221022.

It is not a de Polignac number, because 22012201222221 - 2³ = 22012201222213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012201222321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2869216 + ... + 7228886.

It is an arithmetic number, because the mean of its divisors is an integer number (1109937613824).

Almost surely, 2^{22012201222221} is an apocalyptic number.

22012201222221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22012201222221 is a deficient number, since it is larger than the sum of its proper divisors (13505802420147).

22012201222221 is a wasteful number, since it uses less digits than its factorization.

22012201222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373841.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22012201222221 its reverse (12222210221022), we get a palindrome (34234411443243).

The spelling of 22012201222221 in words is "twenty-two trillion, twelve billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty-one".