22121000021021 has 8 divisors (see below), whose sum is σ = 24784216240224. Its totient is φ = 19566486504720.

The previous prime is 22121000020997. The next prime is 22121000021023. The reversal of 22121000021021 is 12012000012122.

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

It is a cyclic number.

It is not a de Polignac number, because 22121000021021 - 2¹⁰ = 22121000019997 is a prime.

It is a super-3 number, since 3×22121000021021³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121000020987 and 22121000021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121000021023) 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, 27175675295 + ... + 27175676108.

It is an arithmetic number, because the mean of its divisors is an integer number (3098027030028).

Almost surely, 2^{22121000021021} is an apocalyptic number.

It is an amenable number.

22121000021021 is a deficient number, since it is larger than the sum of its proper divisors (2663216219203).

22121000021021 is a wasteful number, since it uses less digits than its factorization.

22121000021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54351351451.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121000021021 its reverse (12012000012122), we get a palindrome (34133000033143).

The spelling of 22121000021021 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one thousand, twenty-one".