12121202201220 has 288 divisors, whose sum is σ = 44982166634496. Its totient is φ = 2681187350400.

The previous prime is 12121202201201. The next prime is 12121202201287. The reversal of 12121202201220 is 2210220212121.

It is a happy number.

12121202201220 is a `hidden beast` number, since 1 + 21 + 21 + 202 + 201 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12121202201193 and 12121202201202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4692096 + ... + 6801335.

It is an arithmetic number, because the mean of its divisors is an integer number (156188078592).

Almost surely, 2^{12121202201220} is an apocalyptic number.

12121202201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121202201220 is an abundant number, since it is smaller than the sum of its proper divisors (32860964433276).

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

12121202201220 is a wasteful number, since it uses less digits than its factorization.

12121202201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493493 (or 11493479 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12121202201220 its reverse (2210220212121), we get a palindrome (14331422413341).

The spelling of 12121202201220 in words is "twelve trillion, one hundred twenty-one billion, two hundred two million, two hundred one thousand, two hundred twenty".