1221120120002 has 8 divisors (see below), whose sum is σ = 1831727068176. Its totient is φ = 610544430612.

The previous prime is 1221120119983. The next prime is 1221120120007. The reversal of 1221120120002 is 2000210211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221120120002² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221120120007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7716788 + ... + 7873439.

It is an arithmetic number, because the mean of its divisors is an integer number (228965883522).

Almost surely, 2^{1221120120002} is an apocalyptic number.

1221120120002 is a deficient number, since it is larger than the sum of its proper divisors (610606948174).

1221120120002 is a wasteful number, since it uses less digits than its factorization.

1221120120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15629392.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221120120002 its reverse (2000210211221), we get a palindrome (3221330331223).

The spelling of 1221120120002 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, two".