121001100011 has 12 divisors (see below), whose sum is σ = 133227865176. Its totient is φ = 109813540320.

The previous prime is 121001100001. The next prime is 121001100049. The reversal of 121001100011 is 110001100121.

It is a happy number.

It is not a de Polignac number, because 121001100011 - 2¹⁰ = 121001098987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001100001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 780770 + ... + 922823.

It is an arithmetic number, because the mean of its divisors is an integer number (11102322098).

Almost surely, 2^121001100011 is an apocalyptic number.

121001100011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121001100011 is a deficient number, since it is larger than the sum of its proper divisors (12226765165).

121001100011 is a wasteful number, since it uses less digits than its factorization.

121001100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704202 (or 1704191 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 121001100011 its reverse (110001100121), we get a palindrome (231002200132).

It can be divided in two parts, 12100 and 1100011, that added together give a palindrome (1112111).

The spelling of 121001100011 in words is "one hundred twenty-one billion, one million, one hundred thousand, eleven".