201001200121100 has 36 divisors (see below), whose sum is σ = 436201993228344. Its totient is φ = 80395062727680.

The previous prime is 201001200121039. The next prime is 201001200121151. The reversal of 201001200121100 is 1121002100102.

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, 66224789 + ... + 69193388.

Almost surely, 2^{201001200121100} is an apocalyptic number.

201001200121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001200121100 is an abundant number, since it is smaller than the sum of its proper divisors (235200793107244).

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

201001200121100 is a wasteful number, since it uses less digits than its factorization.

201001200121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135433034 (or 135433027 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201001200121100 its reverse (1121002100102), we get a palindrome (202122202221202).

The spelling of 201001200121100 in words is "two hundred one trillion, one billion, two hundred million, one hundred twenty-one thousand, one hundred".