1202220121121 has 4 divisors (see below), whose sum is σ = 1203221138244. Its totient is φ = 1201219104000.

The previous prime is 1202220121117. The next prime is 1202220121147. The reversal of 1202220121121 is 1211210222021.

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 17956000000 + 1184264121121 = 134000^2 + 1088239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202220121121 - 2² = 1202220121117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202220121121.

It is not an unprimeable number, because it can be changed into a prime (1202220121021) 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, 500506760 + ... + 500509161.

It is an arithmetic number, because the mean of its divisors is an integer number (300805284561).

Almost surely, 2^{1202220121121} is an apocalyptic number.

It is an amenable number.

1202220121121 is a deficient number, since it is larger than the sum of its proper divisors (1001017123).

1202220121121 is a wasteful number, since it uses less digits than its factorization.

1202220121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001017122.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1202220121121 its reverse (1211210222021), we get a palindrome (2413430343142).

The spelling of 1202220121121 in words is "one trillion, two hundred two billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".