2001210100100 has 36 divisors (see below), whose sum is σ = 4435022223744. Its totient is φ = 783452462880.

The previous prime is 2001210100073. The next prime is 2001210100117. The reversal of 2001210100100 is 10010121002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212889992 + ... + 212899391.

Almost surely, 2^{2001210100100} is an apocalyptic number.

2001210100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001210100100 is an abundant number, since it is smaller than the sum of its proper divisors (2433812123644).

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

2001210100100 is a wasteful number, since it uses less digits than its factorization.

2001210100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425789444 (or 425789437 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2001210100100 its reverse (10010121002), we get a palindrome (2011220221102).

The spelling of 2001210100100 in words is "two trillion, one billion, two hundred ten million, one hundred thousand, one hundred".