1213001201121 has 4 divisors (see below), whose sum is σ = 1617334934832. Its totient is φ = 808667467412.

The previous prime is 1213001201119. The next prime is 1213001201141. The reversal of 1213001201121 is 1211021003121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213001201121 - 2¹ = 1213001201119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213001201121.

It is not an unprimeable number, because it can be changed into a prime (1213001201141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202166866851 + ... + 202166866856.

It is an arithmetic number, because the mean of its divisors is an integer number (404333733708).

Almost surely, 2^{1213001201121} is an apocalyptic number.

It is an amenable number.

1213001201121 is a deficient number, since it is larger than the sum of its proper divisors (404333733711).

1213001201121 is an equidigital number, since it uses as much as digits as its factorization.

1213001201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404333733710.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1213001201121 its reverse (1211021003121), we get a palindrome (2424022204242).

The spelling of 1213001201121 in words is "one trillion, two hundred thirteen billion, one million, two hundred one thousand, one hundred twenty-one".