201121023100 has 36 divisors (see below), whose sum is σ = 443829796200. Its totient is φ = 79084874560.

The previous prime is 201121023091. The next prime is 201121023113. The reversal of 201121023100 is 1320121102.

It is a super-2 number, since 2×201121023100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17038255 + ... + 17050054.

It is an arithmetic number, because the mean of its divisors is an integer number (12328605450).

Almost surely, 2^201121023100 is an apocalyptic number.

201121023100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121023100 is an abundant number, since it is smaller than the sum of its proper divisors (242708773100).

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

201121023100 is a wasteful number, since it uses less digits than its factorization.

201121023100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34088382 (or 34088375 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 201121023100 its reverse (1320121102), we get a palindrome (202441144202).

The spelling of 201121023100 in words is "two hundred one billion, one hundred twenty-one million, twenty-three thousand, one hundred".