22121202121 has 8 divisors (see below), whose sum is σ = 22302483840. Its totient is φ = 21940236912.

The previous prime is 22121202113. The next prime is 22121202127. The reversal of 22121202121 is 12120212122.

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 22121202121 - 2³ = 22121202113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121202095 and 22121202104.

It is not an unprimeable number, because it can be changed into a prime (22121202127) 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, 62256 + ... + 219358.

It is an arithmetic number, because the mean of its divisors is an integer number (2787810480).

Almost surely, 2^22121202121 is an apocalyptic number.

It is an amenable number.

22121202121 is a deficient number, since it is larger than the sum of its proper divisors (181281719).

22121202121 is a wasteful number, since it uses less digits than its factorization.

22121202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158255.

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

Adding to 22121202121 its reverse (12120212122), we get a palindrome (34241414243).

It can be divided in two parts, 22 and 121202121, that multiplied together give a palindrome (2666446662).

The spelling of 22121202121 in words is "twenty-two billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty-one".