121201121012201 has 4 divisors (see below), whose sum is σ = 121201436194692. Its totient is φ = 121200805829712.

The previous prime is 121201121012123. The next prime is 121201121012203. The reversal of 121201121012201 is 102210121102121.

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 24248740338601 + 96952380673600 = 4924301^2 + 9846440^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201121012201 - 2¹⁸ = 121201120750057 is a prime.

It is a super-2 number, since 2×121201121012201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121201121012201.

It is not an unprimeable number, because it can be changed into a prime (121201121012203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157013726 + ... + 157783751.

It is an arithmetic number, because the mean of its divisors is an integer number (30300359048673).

Almost surely, 2^{121201121012201} is an apocalyptic number.

It is an amenable number.

121201121012201 is a deficient number, since it is larger than the sum of its proper divisors (315182491).

121201121012201 is an equidigital number, since it uses as much as digits as its factorization.

121201121012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315182490.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121201121012201 its reverse (102210121102121), we get a palindrome (223411242114322).

The spelling of 121201121012201 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, twelve thousand, two hundred one".