12210011121220 has 72 divisors (see below), whose sum is σ = 28462984190424. Its totient is φ = 4396043520000.

The previous prime is 12210011121169. The next prime is 12210011121239. The reversal of 12210011121220 is 2212111001221.

It can be written as a sum of positive squares in 4 ways, for example, as 2665519900164 + 9544491221056 = 1632642^2 + 3089416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12210011121194 and 12210011121203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24733101 + ... + 25221940.

It is an arithmetic number, because the mean of its divisors is an integer number (395319224867).

Almost surely, 2^{12210011121220} is an apocalyptic number.

12210011121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12210011121220 is an abundant number, since it is smaller than the sum of its proper divisors (16252973069204).

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

12210011121220 is a wasteful number, since it uses less digits than its factorization.

12210011121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49955173 (or 49955160 counting only the distinct ones).

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

Adding to 12210011121220 its reverse (2212111001221), we get a palindrome (14422122122441).

The spelling of 12210011121220 in words is "twelve trillion, two hundred ten billion, eleven million, one hundred twenty-one thousand, two hundred twenty".