1202112121121 has 8 divisors (see below), whose sum is σ = 1273860279720. Its totient is φ = 1130479038208.

The previous prime is 1202112121117. The next prime is 1202112121123. The reversal of 1202112121121 is 1211212112021.

It can be written as a sum of positive squares in 4 ways, for example, as 725156136721 + 476955984400 = 851561^2 + 690620^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1202112121121 - 2² = 1202112121117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 1202112121121.

It is not an unprimeable number, because it can be changed into a prime (1202112121123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28747406 + ... + 28789191.

It is an arithmetic number, because the mean of its divisors is an integer number (159232534965).

Almost surely, 2^{1202112121121} is an apocalyptic number.

It is an amenable number.

1202112121121 is a deficient number, since it is larger than the sum of its proper divisors (71748158599).

1202112121121 is a wasteful number, since it uses less digits than its factorization.

1202112121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57537843.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1202112121121 its reverse (1211212112021), we get a palindrome (2413324233142).

The spelling of 1202112121121 in words is "one trillion, two hundred two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".