22121102212121 has 16 divisors (see below), whose sum is σ = 24221522128320. Its totient is φ = 20035597807680.

The previous prime is 22121102212103. The next prime is 22121102212193. The reversal of 22121102212121 is 12121220112122.

It is a cyclic number.

It is not a de Polignac number, because 22121102212121 - 2⁶ = 22121102212057 is a prime.

It is a super-4 number, since 4×22121102212121⁴ (a number of 54 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22121102212093 and 22121102212102.

It is not an unprimeable number, because it can be changed into a prime (22121102262121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32383715 + ... + 33059751.

It is an arithmetic number, because the mean of its divisors is an integer number (1513845133020).

Almost surely, 2^{22121102212121} is an apocalyptic number.

It is an amenable number.

22121102212121 is a deficient number, since it is larger than the sum of its proper divisors (2100419916199).

22121102212121 is a wasteful number, since it uses less digits than its factorization.

22121102212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687064.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22121102212121 its reverse (12121220112122), we get a palindrome (34242322324243).

The spelling of 22121102212121 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twelve thousand, one hundred twenty-one".