212220121110 has 16 divisors (see below), whose sum is σ = 509328290736. Its totient is φ = 56592032288.

The previous prime is 212220121051. The next prime is 212220121199. The reversal of 212220121110 is 11121022212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212220121110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3537001989 + ... + 3537002048.

It is an arithmetic number, because the mean of its divisors is an integer number (31833018171).

Almost surely, 2^212220121110 is an apocalyptic number.

212220121110 is an abundant number, since it is smaller than the sum of its proper divisors (297108169626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212220121110 is a wasteful number, since it uses less digits than its factorization.

212220121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074004047.

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

Adding to 212220121110 its reverse (11121022212), we get a palindrome (223341143322).

The spelling of 212220121110 in words is "two hundred twelve billion, two hundred twenty million, one hundred twenty-one thousand, one hundred ten".