1202122012121 has 4 divisors (see below), whose sum is σ = 1202526633744. Its totient is φ = 1201717390500.

The previous prime is 1202122012073. The next prime is 1202122012139. The reversal of 1202122012121 is 1212102212021.

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 1202122012121 - 2³⁰ = 1201048270297 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 1202122012121.

It is not an unprimeable number, because it can be changed into a prime (1202122012151) 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, 202306355 + ... + 202312296.

It is an arithmetic number, because the mean of its divisors is an integer number (300631658436).

Almost surely, 2^{1202122012121} is an apocalyptic number.

It is an amenable number.

1202122012121 is a deficient number, since it is larger than the sum of its proper divisors (404621623).

1202122012121 is an equidigital number, since it uses as much as digits as its factorization.

1202122012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404621622.

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

Adding to 1202122012121 its reverse (1212102212021), we get a palindrome (2414224224142).

The spelling of 1202122012121 in words is "one trillion, two hundred two billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".