100121220132 has 12 divisors (see below), whose sum is σ = 233616180336. Its totient is φ = 33373740040.

The previous prime is 100121220131. The next prime is 100121220137. The reversal of 100121220132 is 231022121001.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (100121220131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4171717494 + ... + 4171717517.

It is an arithmetic number, because the mean of its divisors is an integer number (19468015028).

Almost surely, 2^100121220132 is an apocalyptic number.

100121220132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100121220132 is an abundant number, since it is smaller than the sum of its proper divisors (133494960204).

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

100121220132 is a wasteful number, since it uses less digits than its factorization.

100121220132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343435018 (or 8343435016 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 100121220132 its reverse (231022121001), we get a palindrome (331143341133).

The spelling of 100121220132 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirty-two".