201012021100 has 36 divisors (see below), whose sum is σ = 475850278008. Its totient is φ = 73095280000.

The previous prime is 201012021053. The next prime is 201012021101. The reversal of 201012021100 is 1120210102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (201012021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91368001 + ... + 91370200.

It is an arithmetic number, because the mean of its divisors is an integer number (13218063278).

Almost surely, 2^201012021100 is an apocalyptic number.

201012021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201012021100 is an abundant number, since it is smaller than the sum of its proper divisors (274838256908).

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

201012021100 is a wasteful number, since it uses less digits than its factorization.

201012021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182738226 (or 182738219 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201012021100 its reverse (1120210102), we get a palindrome (202132231202).

The spelling of 201012021100 in words is "two hundred one billion, twelve million, twenty-one thousand, one hundred".