22121021220121 has 8 divisors (see below), whose sum is σ = 22172820611040. Its totient is φ = 22069230230112.

The previous prime is 22121021220101. The next prime is 22121021220187. The reversal of 22121021220121 is 12102212012122.

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 22121021220121 - 2¹³ = 22121021211929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121021220101) 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, 3187845 + ... + 7375933.

It is an arithmetic number, because the mean of its divisors is an integer number (2771602576380).

Almost surely, 2^{22121021220121} is an apocalyptic number.

It is an amenable number.

22121021220121 is a deficient number, since it is larger than the sum of its proper divisors (51799390919).

22121021220121 is a wasteful number, since it uses less digits than its factorization.

22121021220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200455.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22121021220121 its reverse (12102212012122), we get a palindrome (34223233232243).

The spelling of 22121021220121 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".