121011110001 has 48 divisors (see below), whose sum is σ = 184491635328. Its totient is φ = 79247548800.

The previous prime is 121011109987. The next prime is 121011110039. The reversal of 121011110001 is 100011110121.

It is not a de Polignac number, because 121011110001 - 2¹⁵ = 121011077233 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 (121011114001) 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, 4766421 + ... + 4791741.

It is an arithmetic number, because the mean of its divisors is an integer number (3843575736).

Almost surely, 2^121011110001 is an apocalyptic number.

It is an amenable number.

121011110001 is a deficient number, since it is larger than the sum of its proper divisors (63480525327).

121011110001 is an equidigital number, since it uses as much as digits as its factorization.

121011110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25684 (or 25672 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121011110001 its reverse (100011110121), we get a palindrome (221022220122).

The spelling of 121011110001 in words is "one hundred twenty-one billion, eleven million, one hundred ten thousand, one".