10002020721100 has 18 divisors (see below), whose sum is σ = 21704384965004. Its totient is φ = 4000808288400.

The previous prime is 10002020721073. The next prime is 10002020721131. The reversal of 10002020721100 is 112702020001.

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 5 ways as a sum of consecutive naturals, for example, 50010103506 + ... + 50010103705.

Almost surely, 2^{10002020721100} is an apocalyptic number.

10002020721100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10002020721100 is an abundant number, since it is smaller than the sum of its proper divisors (11702364243904).

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

10002020721100 is a wasteful number, since it uses less digits than its factorization.

10002020721100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100020207225 (or 100020207218 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 10002020721100 its reverse (112702020001), we get a palindrome (10114722741101).

The spelling of 10002020721100 in words is "ten trillion, two billion, twenty million, seven hundred twenty-one thousand, one hundred".