22211210121 has 32 divisors (see below), whose sum is σ = 31499020800. Its totient is φ = 13881997440.

The previous prime is 22211210117. The next prime is 22211210123. The reversal of 22211210121 is 12101211222.

It is not a de Polignac number, because 22211210121 - 2² = 22211210117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22211210121.

It is not an unprimeable number, because it can be changed into a prime (22211210123) 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 31 ways as a sum of consecutive naturals, for example, 9031390 + ... + 9033848.

It is an arithmetic number, because the mean of its divisors is an integer number (984344400).

Almost surely, 2^22211210121 is an apocalyptic number.

It is an amenable number.

22211210121 is a deficient number, since it is larger than the sum of its proper divisors (9287810679).

22211210121 is a wasteful number, since it uses less digits than its factorization.

22211210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22211210121 its reverse (12101211222), we get a palindrome (34312421343).

The spelling of 22211210121 in words is "twenty-two billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".