121102100001 has 16 divisors (see below), whose sum is σ = 183582857920. Its totient is φ = 78857180640.

The previous prime is 121102099969. The next prime is 121102100033. The reversal of 121102100001 is 100001201121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121102099969) and next prime (121102100033).

It is not a de Polignac number, because 121102100001 - 2⁵ = 121102099969 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121102170001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52153060 + ... + 52155381.

It is an arithmetic number, because the mean of its divisors is an integer number (11473928620).

Almost surely, 2^121102100001 is an apocalyptic number.

It is an amenable number.

121102100001 is a deficient number, since it is larger than the sum of its proper divisors (62480757919).

121102100001 is a wasteful number, since it uses less digits than its factorization.

121102100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104308493 (or 104308487 counting only the distinct ones).

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

Adding to 121102100001 its reverse (100001201121), we get a palindrome (221103301122).

The spelling of 121102100001 in words is "one hundred twenty-one billion, one hundred two million, one hundred thousand, one".