100020011121 has 48 divisors (see below), whose sum is σ = 149991948288. Its totient is φ = 64184517600.

The previous prime is 100020011051. The next prime is 100020011123. The reversal of 100020011121 is 121110020001.

It is a happy number.

It is not a de Polignac number, because 100020011121 - 2⁹ = 100020010609 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100020011123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12940360 + ... + 12948086.

It is an arithmetic number, because the mean of its divisors is an integer number (3124832256).

Almost surely, 2^100020011121 is an apocalyptic number.

It is an amenable number.

100020011121 is a deficient number, since it is larger than the sum of its proper divisors (49971937167).

100020011121 is a wasteful number, since it uses less digits than its factorization.

100020011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8282 (or 8279 counting only the distinct ones).

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

Adding to 100020011121 its reverse (121110020001), we get a palindrome (221130031122).

The spelling of 100020011121 in words is "one hundred billion, twenty million, eleven thousand, one hundred twenty-one".