20002001121220 has 24 divisors (see below), whose sum is σ = 43359176625408. Its totient is φ = 7742710111200.

The previous prime is 20002001121163. The next prime is 20002001121247. The reversal of 20002001121220 is 2212110020002.

It is a happy number.

It is a super-2 number, since 2×20002001121220² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20002001121220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16130645446 + ... + 16130646685.

It is an arithmetic number, because the mean of its divisors is an integer number (1806632359392).

Almost surely, 2^{20002001121220} is an apocalyptic number.

20002001121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002001121220 is an abundant number, since it is smaller than the sum of its proper divisors (23357175504188).

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

20002001121220 is a wasteful number, since it uses less digits than its factorization.

20002001121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32261292171 (or 32261292169 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20002001121220 its reverse (2212110020002), we get a palindrome (22214111141222).

The spelling of 20002001121220 in words is "twenty trillion, two billion, one million, one hundred twenty-one thousand, two hundred twenty".