100121201988 has 24 divisors (see below), whose sum is σ = 233888124960. Its totient is φ = 33334878720.

The previous prime is 100121201987. The next prime is 100121202037. The reversal of 100121201988 is 889102121001.

It is not an unprimeable number, because it can be changed into a prime (100121201987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4846173 + ... + 4866788.

It is an arithmetic number, because the mean of its divisors is an integer number (9745338540).

Almost surely, 2^100121201988 is an apocalyptic number.

It is an amenable number.

100121201988 is an abundant number, since it is smaller than the sum of its proper divisors (133766922972).

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

100121201988 is a wasteful number, since it uses less digits than its factorization.

100121201988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9713827 (or 9713825 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

Adding to 100121201988 its reverse (889102121001), we get a palindrome (989223322989).

The spelling of 100121201988 in words is "one hundred billion, one hundred twenty-one million, two hundred one thousand, nine hundred eighty-eight".