22021101001221 has 8 divisors (see below), whose sum is σ = 33555963430464. Its totient is φ = 12583486286400.

The previous prime is 22021101001187. The next prime is 22021101001247. The reversal of 22021101001221 is 12210010112022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22021101001221 - 2¹³ = 22021100993029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021101001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021101002221) 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, 524311928580 + ... + 524311928621.

It is an arithmetic number, because the mean of its divisors is an integer number (4194495428808).

Almost surely, 2^{22021101001221} is an apocalyptic number.

22021101001221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22021101001221 is a deficient number, since it is larger than the sum of its proper divisors (11534862429243).

22021101001221 is a wasteful number, since it uses less digits than its factorization.

22021101001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048623857211.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22021101001221 its reverse (12210010112022), we get a palindrome (34231111113243).

The spelling of 22021101001221 in words is "twenty-two trillion, twenty-one billion, one hundred one million, one thousand, two hundred twenty-one".