212220220121 has 8 divisors (see below), whose sum is σ = 261194117184. Its totient is φ = 167910503760.

The previous prime is 212220220117. The next prime is 212220220153. The reversal of 212220220121 is 121022022212.

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 212220220121 - 2² = 212220220117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212220220121.

It is not an unprimeable number, because it can be changed into a prime (212220220181) 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, 1166045075 + ... + 1166045256.

It is an arithmetic number, because the mean of its divisors is an integer number (32649264648).

Almost surely, 2^212220220121 is an apocalyptic number.

It is an amenable number.

212220220121 is a deficient number, since it is larger than the sum of its proper divisors (48973897063).

212220220121 is a wasteful number, since it uses less digits than its factorization.

212220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332090351.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212220220121 its reverse (121022022212), we get a palindrome (333242242333).

The spelling of 212220220121 in words is "two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".