20121200002220 has 12 divisors (see below), whose sum is σ = 42254520004704. Its totient is φ = 8048480000880.

The previous prime is 20121200002199. The next prime is 20121200002223. The reversal of 20121200002220 is 2220000212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121200002195 and 20121200002204.

It is not an unprimeable number, because it can be changed into a prime (20121200002223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503030000036 + ... + 503030000075.

It is an arithmetic number, because the mean of its divisors is an integer number (3521210000392).

Almost surely, 2^{20121200002220} is an apocalyptic number.

20121200002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121200002220 is an abundant number, since it is smaller than the sum of its proper divisors (22133320002484).

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

20121200002220 is a wasteful number, since it uses less digits than its factorization.

20121200002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006060000120 (or 1006060000118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20121200002220 its reverse (2220000212102), we get a palindrome (22341200214322).

The spelling of 20121200002220 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, two thousand, two hundred twenty".