202100120 has 16 divisors (see below), whose sum is σ = 454725360. Its totient is φ = 80840032.

The previous prime is 202100069. The next prime is 202100123. The reversal of 202100120 is 21001202.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 202100098 and 202100107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526212 + ... + 2526291.

It is an arithmetic number, because the mean of its divisors is an integer number (28420335).

Almost surely, 2^202100120 is an apocalyptic number.

202100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100120 is an abundant number, since it is smaller than the sum of its proper divisors (252625240).

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

202100120 is a wasteful number, since it uses less digits than its factorization.

202100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052514 (or 5052510 counting only the distinct ones).

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

The square root of 202100120 is about 14216.1921765288. The cubic root of 202100120 is about 586.8433538637.

Adding to 202100120 its reverse (21001202), we get a palindrome (223101322).

The spelling of 202100120 in words is "two hundred two million, one hundred thousand, one hundred twenty".