201023100 has 72 divisors (see below), whose sum is σ = 646260720. Its totient is φ = 53605440.

The previous prime is 201023071. The next prime is 201023101. The reversal of 201023100 is 1320102.

It is a happy number.

It is a super-3 number, since 3×201023100³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201023101) 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, 34527 + ... + 39926.

Almost surely, 2^201023100 is an apocalyptic number.

201023100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201023100 is an abundant number, since it is smaller than the sum of its proper divisors (445237620).

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

201023100 is a wasteful number, since it uses less digits than its factorization.

201023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74476 (or 74463 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 201023100 is about 14178.2615295388. The cubic root of 201023100 is about 585.7990396036.

Adding to 201023100 its reverse (1320102), we get a palindrome (202343202).

The spelling of 201023100 in words is "two hundred one million, twenty-three thousand, one hundred".