1201201302121 has 4 divisors (see below), whose sum is σ = 1201203609172. Its totient is φ = 1201198995072.

The previous prime is 1201201302107. The next prime is 1201201302143. The reversal of 1201201302121 is 1212031021021.

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 1155410010000 + 45791292121 = 1074900^2 + 213989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201201302121 - 2⁹ = 1201201301609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201201302095 and 1201201302104.

It is not an unprimeable number, because it can be changed into a prime (1201201302151) 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, 37141 + ... + 1550413.

It is an arithmetic number, because the mean of its divisors is an integer number (300300902293).

Almost surely, 2^{1201201302121} is an apocalyptic number.

It is an amenable number.

1201201302121 is a deficient number, since it is larger than the sum of its proper divisors (2307051).

1201201302121 is an equidigital number, since it uses as much as digits as its factorization.

1201201302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307050.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1201201302121 its reverse (1212031021021), we get a palindrome (2413232323142).

It can be divided in two parts, 120120 and 1302121, that added together give a palindrome (1422241).

The spelling of 1201201302121 in words is "one trillion, two hundred one billion, two hundred one million, three hundred two thousand, one hundred twenty-one".