202102001100 has 144 divisors (see below), whose sum is σ = 665567713440. Its totient is φ = 52579353600.

The previous prime is 202102001069. The next prime is 202102001107. The reversal of 202102001100 is 1100201202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (202102001107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 802137 + ... + 1023536.

It is an arithmetic number, because the mean of its divisors is an integer number (4621998010).

Almost surely, 2^202102001100 is an apocalyptic number.

202102001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102001100 is an abundant number, since it is smaller than the sum of its proper divisors (463465712340).

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

202102001100 is a wasteful number, since it uses less digits than its factorization.

202102001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825737 (or 1825724 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 202102001100 its reverse (1100201202), we get a palindrome (203202202302).

The spelling of 202102001100 in words is "two hundred two billion, one hundred two million, one thousand, one hundred".