1202121212121 has 12 divisors (see below), whose sum is σ = 1736435602980. Its totient is φ = 801396466080.

The previous prime is 1202121212077. The next prime is 1202121212129. The reversal of 1202121212121 is 1212121212021.

1202121212121 is a `hidden beast` number, since 120 + 212 + 1 + 212 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 716401424025 + 485719788096 = 846405^2 + 696936^2 .

It is not a de Polignac number, because 1202121212121 - 2²² = 1202117017817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202121212094 and 1202121212103.

It is not an unprimeable number, because it can be changed into a prime (1202121212129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1035366 + ... + 1864463.

It is an arithmetic number, because the mean of its divisors is an integer number (144702966915).

Almost surely, 2^{1202121212121} is an apocalyptic number.

It is an amenable number.

1202121212121 is a deficient number, since it is larger than the sum of its proper divisors (534314390859).

1202121212121 is a wasteful number, since it uses less digits than its factorization.

1202121212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945896 (or 2945893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1202121212121 its reverse (1212121212021), we get a palindrome (2414242424142).

The spelling of 1202121212121 in words is "one trillion, two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".