120001211100 has 72 divisors (see below), whose sum is σ = 385781679920. Its totient is φ = 32000322240.

The previous prime is 120001211089. The next prime is 120001211119. The reversal of 120001211100 is 1112100021.

It is a happy number.

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

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, 22219747 + ... + 22225146.

Almost surely, 2^120001211100 is an apocalyptic number.

120001211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120001211100 is an abundant number, since it is smaller than the sum of its proper divisors (265780468820).

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

120001211100 is a wasteful number, since it uses less digits than its factorization.

120001211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44444916 (or 44444903 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120001211100 its reverse (1112100021), we get a palindrome (121113311121).

The spelling of 120001211100 in words is "one hundred twenty billion, one million, two hundred eleven thousand, one hundred".