202120431312121 has 8 divisors (see below), whose sum is σ = 231008907758400. Its totient is φ = 173235487144848.

The previous prime is 202120431312077. The next prime is 202120431312161. The reversal of 202120431312121 is 121213134021202.

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 202120431312121 - 2³⁹ = 201570675498233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120431312161) 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, 882947131 + ... + 883176016.

It is an arithmetic number, because the mean of its divisors is an integer number (28876113469800).

Almost surely, 2^{202120431312121} is an apocalyptic number.

It is an amenable number.

202120431312121 is a deficient number, since it is larger than the sum of its proper divisors (28888476446279).

202120431312121 is a wasteful number, since it uses less digits than its factorization.

202120431312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766139503.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 202120431312121 its reverse (121213134021202), we get a palindrome (323333565333323).

The spelling of 202120431312121 in words is "two hundred two trillion, one hundred twenty billion, four hundred thirty-one million, three hundred twelve thousand, one hundred twenty-one".