121001123321111 has 16 divisors (see below), whose sum is σ = 135719737284096. Its totient is φ = 106922061720000.

The previous prime is 121001123321093. The next prime is 121001123321131. The reversal of 121001123321111 is 111123321100121.

It is a cyclic number.

It is not a de Polignac number, because 121001123321111 - 2³⁴ = 120983943451927 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 (121001123321131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494887325 + ... + 495131766.

It is an arithmetic number, because the mean of its divisors is an integer number (8482483580256).

Almost surely, 2^{121001123321111} is an apocalyptic number.

121001123321111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121001123321111 is a deficient number, since it is larger than the sum of its proper divisors (14718613962985).

121001123321111 is a wasteful number, since it uses less digits than its factorization.

121001123321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990019414.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121001123321111 its reverse (111123321100121), we get a palindrome (232124444421232).

It can be divided in two parts, 12100 and 1123321111, that added together give a palindrome (1123333211).

The spelling of 121001123321111 in words is "one hundred twenty-one trillion, one billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred eleven".