100020121988 has 48 divisors (see below), whose sum is σ = 188612981760. Its totient is φ = 46274025600.

The previous prime is 100020121963. The next prime is 100020122051. The reversal of 100020121988 is 889121020001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9203678 + ... + 9214538.

It is an arithmetic number, because the mean of its divisors is an integer number (3929437120).

Almost surely, 2^100020121988 is an apocalyptic number.

It is an amenable number.

100020121988 is a deficient number, since it is larger than the sum of its proper divisors (88592859772).

100020121988 is a wasteful number, since it uses less digits than its factorization.

100020121988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14148 (or 14146 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

Adding to 100020121988 its reverse (889121020001), we get a palindrome (989141141989).

The spelling of 100020121988 in words is "one hundred billion, twenty million, one hundred twenty-one thousand, nine hundred eighty-eight".