1202112220121 has 4 divisors (see below), whose sum is σ = 1203594480144. Its totient is φ = 1200629960100.

The previous prime is 1202112220097. The next prime is 1202112220139. The reversal of 1202112220121 is 1210222112021.

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 a de Polignac number, because none of the positive numbers 2^k-1202112220121 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 1202112220121.

It is not an unprimeable number, because it can be changed into a prime (1202112220021) 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, 741128795 + ... + 741130416.

It is an arithmetic number, because the mean of its divisors is an integer number (300898620036).

Almost surely, 2^{1202112220121} is an apocalyptic number.

It is an amenable number.

1202112220121 is a deficient number, since it is larger than the sum of its proper divisors (1482260023).

1202112220121 is an equidigital number, since it uses as much as digits as its factorization.

1202112220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482260022.

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

Adding to 1202112220121 its reverse (1210222112021), we get a palindrome (2412334332142).

The spelling of 1202112220121 in words is "one trillion, two hundred two billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-one".