12001020022100 has 72 divisors (see below), whose sum is σ = 26162178122808. Its totient is φ = 4778307635200.

The previous prime is 12001020022091. The next prime is 12001020022127. The reversal of 12001020022100 is 122002010021.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 561594364816 + 11439425657284 = 749396^2 + 3382222^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75809030 + ... + 75967170.

It is an arithmetic number, because the mean of its divisors is an integer number (363363585039).

Almost surely, 2^{12001020022100} is an apocalyptic number.

12001020022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001020022100 is an abundant number, since it is smaller than the sum of its proper divisors (14161158100708).

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

12001020022100 is a wasteful number, since it uses less digits than its factorization.

12001020022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161645 (or 161638 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12001020022100 its reverse (122002010021), we get a palindrome (12123022032121).

The spelling of 12001020022100 in words is "twelve trillion, one billion, twenty million, twenty-two thousand, one hundred".