20000101212220 has 48 divisors (see below), whose sum is σ = 42152661125568. Its totient is φ = 7971024821760.

The previous prime is 20000101212187. The next prime is 20000101212251. The reversal of 20000101212220 is 2221210100002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20000101212220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13775622 + ... + 15158098.

It is an arithmetic number, because the mean of its divisors is an integer number (878180440116).

Almost surely, 2^{20000101212220} is an apocalyptic number.

20000101212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000101212220 is an abundant number, since it is smaller than the sum of its proper divisors (22152559913348).

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

20000101212220 is a wasteful number, since it uses less digits than its factorization.

20000101212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385110 (or 1385108 counting only the distinct ones).

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

Adding to 20000101212220 its reverse (2221210100002), we get a palindrome (22221311312222).

The spelling of 20000101212220 in words is "twenty trillion, one hundred one million, two hundred twelve thousand, two hundred twenty".