2000021220100 has 18 divisors (see below), whose sum is σ = 4340046047834. Its totient is φ = 800008488000.

The previous prime is 2000021220059. The next prime is 2000021220103. The reversal of 2000021220100 is 10221200002.

It can be written as a sum of positive squares in 3 ways, for example, as 486983456964 + 1513037763136 = 697842^2 + 1230056^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2000021220103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10000106001 + ... + 10000106200.

Almost surely, 2^{2000021220100} is an apocalyptic number.

2000021220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000021220100 is an abundant number, since it is smaller than the sum of its proper divisors (2340024827734).

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

2000021220100 is a wasteful number, since it uses less digits than its factorization.

2000021220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000212215 (or 20000212208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2000021220100 its reverse (10221200002), we get a palindrome (2010242420102).

The spelling of 2000021220100 in words is "two trillion, twenty-one million, two hundred twenty thousand, one hundred".