1202202120121 has 4 divisors (see below), whose sum is σ = 1202205747600. Its totient is φ = 1202198492644.

The previous prime is 1202202120113. The next prime is 1202202120137. The reversal of 1202202120121 is 1210212022021.

It is a happy number.

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 1202202120121 - 2³ = 1202202120113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202202120095 and 1202202120104.

It is not an unprimeable number, because it can be changed into a prime (1202202120191) 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, 1260331 + ... + 1998208.

It is an arithmetic number, because the mean of its divisors is an integer number (300551436900).

Almost surely, 2^{1202202120121} is an apocalyptic number.

It is an amenable number.

1202202120121 is a deficient number, since it is larger than the sum of its proper divisors (3627479).

1202202120121 is an equidigital number, since it uses as much as digits as its factorization.

1202202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1202202120121 its reverse (1210212022021), we get a palindrome (2412414142142).

The spelling of 1202202120121 in words is "one trillion, two hundred two billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".