22212012121 has 8 divisors (see below), whose sum is σ = 23976134784. Its totient is φ = 20455818960.

The previous prime is 22212012101. The next prime is 22212012139. The reversal of 22212012121 is 12121021222.

It is a happy number.

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 22212012121 - 2⁹ = 22212011609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212012095 and 22212012104.

It is not an unprimeable number, because it can be changed into a prime (22212012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976551 + ... + 1987756.

It is an arithmetic number, because the mean of its divisors is an integer number (2997016848).

Almost surely, 2^22212012121 is an apocalyptic number.

It is an amenable number.

22212012121 is a deficient number, since it is larger than the sum of its proper divisors (1764122663).

22212012121 is a wasteful number, since it uses less digits than its factorization.

22212012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964751.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22212012121 its reverse (12121021222), we get a palindrome (34333033343).

The spelling of 22212012121 in words is "twenty-two billion, two hundred twelve million, twelve thousand, one hundred twenty-one".