201000000021100 has 72 divisors (see below), whose sum is σ = 520153043574528. Its totient is φ = 65918012424000.

The previous prime is 201000000021053. The next prime is 201000000021101. The reversal of 201000000021100 is 1120000000102.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (201000000021101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6242219926 + ... + 6242252125.

It is an arithmetic number, because the mean of its divisors is an integer number (7224347827424).

Almost surely, 2^{201000000021100} is an apocalyptic number.

201000000021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201000000021100 is an abundant number, since it is smaller than the sum of its proper divisors (319153043553428).

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

201000000021100 is a wasteful number, since it uses less digits than its factorization.

201000000021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12484472095 (or 12484472088 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 201000000021100 its reverse (1120000000102), we get a palindrome (202120000021202).

The spelling of 201000000021100 in words is "two hundred one trillion, twenty-one thousand, one hundred".