100020110121 has 32 divisors (see below), whose sum is σ = 152950976640. Its totient is φ = 64557043200.

The previous prime is 100020110111. The next prime is 100020110131. The reversal of 100020110121 is 121011020001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100020110111) and next prime (100020110131).

It is not a de Polignac number, because 100020110121 - 2¹⁰ = 100020109097 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 (100020110111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199840 + ... + 489873.

It is an arithmetic number, because the mean of its divisors is an integer number (4779718020).

Almost surely, 2^100020110121 is an apocalyptic number.

It is an amenable number.

100020110121 is a deficient number, since it is larger than the sum of its proper divisors (52930866519).

100020110121 is a wasteful number, since it uses less digits than its factorization.

100020110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689894 (or 689888 counting only the distinct ones).

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

Adding to 100020110121 its reverse (121011020001), we get a palindrome (221031130122).

The spelling of 100020110121 in words is "one hundred billion, twenty million, one hundred ten thousand, one hundred twenty-one".