121111000101 has 96 divisors (see below), whose sum is σ = 222726183680. Its totient is φ = 61706852352.

The previous prime is 121111000099. The next prime is 121111000103. The reversal of 121111000101 is 101000111121.

It is an interprime number because it is at equal distance from previous prime (121111000099) and next prime (121111000103).

It is not a de Polignac number, because 121111000101 - 2¹ = 121111000099 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111000103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4197741 + ... + 4226493.

Almost surely, 2^121111000101 is an apocalyptic number.

It is an amenable number.

121111000101 is a deficient number, since it is larger than the sum of its proper divisors (101615183579).

121111000101 is a wasteful number, since it uses less digits than its factorization.

121111000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28955 (or 28952 counting only the distinct ones).

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

Adding to 121111000101 its reverse (101000111121), we get a palindrome (222111111222).

The spelling of 121111000101 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred one", and thus it is an aban number.