21212211210122 has 8 divisors (see below), whose sum is σ = 33201721894176. Its totient is φ = 10144970578732.

The previous prime is 21212211210121. The next prime is 21212211210313. The reversal of 21212211210122 is 22101211221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21212211210094 and 21212211210103.

It is not an unprimeable number, because it can be changed into a prime (21212211210121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230567513108 + ... + 230567513199.

It is an arithmetic number, because the mean of its divisors is an integer number (4150215236772).

Almost surely, 2^{21212211210122} is an apocalyptic number.

21212211210122 is a deficient number, since it is larger than the sum of its proper divisors (11989510684054).

21212211210122 is a wasteful number, since it uses less digits than its factorization.

21212211210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461135026332.

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

Adding to 21212211210122 its reverse (22101211221212), we get a palindrome (43313422431334).

The spelling of 21212211210122 in words is "twenty-one trillion, two hundred twelve billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-two".