12121211023320 has 128 divisors (see below), whose sum is σ = 41598749629440. Its totient is φ = 2767875064320.

The previous prime is 12121211023283. The next prime is 12121211023379. The reversal of 12121211023320 is 2332011212121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6132027 + ... + 7864106.

It is an arithmetic number, because the mean of its divisors is an integer number (324990231480).

Almost surely, 2^{12121211023320} is an apocalyptic number.

12121211023320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121211023320 is an abundant number, since it is smaller than the sum of its proper divisors (29477538606120).

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

12121211023320 is a wasteful number, since it uses less digits than its factorization.

12121211023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13997185 (or 13997181 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12121211023320 its reverse (2332011212121), we get a palindrome (14453222235441).

The spelling of 12121211023320 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, twenty-three thousand, three hundred twenty".