1201201020121 has 4 divisors (see below), whose sum is σ = 1202331031552. Its totient is φ = 1200071008692.

The previous prime is 1201201020083. The next prime is 1201201020263. The reversal of 1201201020121 is 1210201021021.

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 1201201020121 - 2²¹ = 1201198922969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201201027121) 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, 565004121 + ... + 565006246.

It is an arithmetic number, because the mean of its divisors is an integer number (300582757888).

Almost surely, 2^{1201201020121} is an apocalyptic number.

It is an amenable number.

1201201020121 is a deficient number, since it is larger than the sum of its proper divisors (1130011431).

1201201020121 is a wasteful number, since it uses less digits than its factorization.

1201201020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130011430.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201201020121 its reverse (1210201021021), we get a palindrome (2411402041142).

The spelling of 1201201020121 in words is "one trillion, two hundred one billion, two hundred one million, twenty thousand, one hundred twenty-one".