12210121101220 has 24 divisors (see below), whose sum is σ = 29304290643264. Its totient is φ = 4186327234656.

The previous prime is 12210121101209. The next prime is 12210121101221. The reversal of 12210121101220 is 2210112101221.

It is a junction number, because it is equal to n+sod(n) for n = 12210121101194 and 12210121101203.

It is not an unprimeable number, because it can be changed into a prime (12210121101221) 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, 43607575222 + ... + 43607575501.

It is an arithmetic number, because the mean of its divisors is an integer number (1221012110136).

Almost surely, 2^{12210121101220} is an apocalyptic number.

12210121101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12210121101220 is an abundant number, since it is smaller than the sum of its proper divisors (17094169542044).

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

12210121101220 is a wasteful number, since it uses less digits than its factorization.

12210121101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87215150739 (or 87215150737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12210121101220 its reverse (2210112101221), we get a palindrome (14420233202441).

It can be divided in two parts, 1221012 and 1101220, that added together give a palindrome (2322232).

The spelling of 12210121101220 in words is "twelve trillion, two hundred ten billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".