20012000101220 has 12 divisors (see below), whose sum is σ = 42025200212604. Its totient is φ = 8004800040480.

The previous prime is 20012000101207. The next prime is 20012000101241. The reversal of 20012000101220 is 2210100021002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5822298747136 + 14189701354084 = 2412944^2 + 3766922^2 .

It is an unprimeable number.

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, 500300002511 + ... + 500300002550.

It is an arithmetic number, because the mean of its divisors is an integer number (3502100017717).

Almost surely, 2^{20012000101220} is an apocalyptic number.

20012000101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012000101220 is an abundant number, since it is smaller than the sum of its proper divisors (22013200111384).

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

20012000101220 is a wasteful number, since it uses less digits than its factorization.

20012000101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000600005070 (or 1000600005068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20012000101220 its reverse (2210100021002), we get a palindrome (22222100122222).

The spelling of 20012000101220 in words is "twenty trillion, twelve billion, one hundred one thousand, two hundred twenty".