1201202120121 has 8 divisors (see below), whose sum is σ = 1607302482144. Its totient is φ = 797951585760.

The previous prime is 1201202120117. The next prime is 1201202120147. The reversal of 1201202120121 is 1210212021021.

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

It is not a de Polignac number, because 1201202120121 - 2² = 1201202120117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201202120121.

It is not an unprimeable number, because it can be changed into a prime (1201202120101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712455931 + ... + 712457616.

It is an arithmetic number, because the mean of its divisors is an integer number (200912810268).

Almost surely, 2^{1201202120121} is an apocalyptic number.

It is an amenable number.

1201202120121 is a deficient number, since it is larger than the sum of its proper divisors (406100362023).

1201202120121 is a wasteful number, since it uses less digits than its factorization.

1201202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424913831.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201202120121 its reverse (1210212021021), we get a palindrome (2411414141142).

The spelling of 1201202120121 in words is "one trillion, two hundred one billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".