20012201000100 has 216 divisors, whose sum is σ = 64430300927720. Its totient is φ = 5191722915840.

The previous prime is 20012201000089. The next prime is 20012201000173. The reversal of 20012201000100 is 100010221002.

It can be written as a sum of positive squares in 12 ways, for example, as 3793426219584 + 16218774780516 = 1947672^2 + 4027254^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 314087046 + ... + 314150754.

Almost surely, 2^{20012201000100} is an apocalyptic number.

20012201000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012201000100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32215150463860).

20012201000100 is an abundant number, since it is smaller than the sum of its proper divisors (44418099927620).

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

20012201000100 is a wasteful number, since it uses less digits than its factorization.

20012201000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73199 (or 73189 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012201000100 its reverse (100010221002), we get a palindrome (20112211221102).

The spelling of 20012201000100 in words is "twenty trillion, twelve billion, two hundred one million, one hundred", and thus it is an aban number.