121121111101201 has 4 divisors (see below), whose sum is σ = 121735939076532. Its totient is φ = 120506283125872.

The previous prime is 121121111101181. The next prime is 121121111101229. The reversal of 121121111101201 is 102101111121121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93512381232400 + 27608729868801 = 9670180^2 + 5254401^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121111101201 - 2⁵ = 121121111101169 is a prime.

It is a super-2 number, since 2×121121111101201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121111111201) 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 3 ways as a sum of consecutive naturals, for example, 307413987370 + ... + 307413987763.

It is an arithmetic number, because the mean of its divisors is an integer number (30433984769133).

Almost surely, 2^{121121111101201} is an apocalyptic number.

It is an amenable number.

121121111101201 is a deficient number, since it is larger than the sum of its proper divisors (614827975331).

121121111101201 is an equidigital number, since it uses as much as digits as its factorization.

121121111101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614827975330.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121121111101201 its reverse (102101111121121), we get a palindrome (223222222222322).

The spelling of 121121111101201 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand, two hundred one".