121111110011101 has 6 divisors (see below), whose sum is σ = 140884352461950. Its totient is φ = 103809522866616.

The previous prime is 121111110011081. The next prime is 121111110011167. The reversal of 121111110011101 is 101110011111121.

It can be written as a sum of positive squares in only one way, i.e., 108943389384025 + 12167720627076 = 10437595^2 + 3488226^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121111110011101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111110071101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1235827653126 + ... + 1235827653223.

It is an arithmetic number, because the mean of its divisors is an integer number (23480725410325).

Almost surely, 2^{121111110011101} is an apocalyptic number.

It is an amenable number.

121111110011101 is a deficient number, since it is larger than the sum of its proper divisors (19773242450849).

121111110011101 is an equidigital number, since it uses as much as digits as its factorization.

121111110011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471655306363 (or 2471655306356 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 121111110011101 its reverse (101110011111121), we get a palindrome (222221121122222).

The spelling of 121111110011101 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred ten million, eleven thousand, one hundred one".