202112435021 has 4 divisors (see below), whose sum is σ = 230985640032. Its totient is φ = 173239230012.

The previous prime is 202112435017. The next prime is 202112435033. The reversal of 202112435021 is 120534211202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120534211202 = 2 ⋅60267105601.

It is a cyclic number.

It is not a de Polignac number, because 202112435021 - 2² = 202112435017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112435011) 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, 14436602495 + ... + 14436602508.

It is an arithmetic number, because the mean of its divisors is an integer number (57746410008).

Almost surely, 2^202112435021 is an apocalyptic number.

It is an amenable number.

202112435021 is a deficient number, since it is larger than the sum of its proper divisors (28873205011).

202112435021 is an equidigital number, since it uses as much as digits as its factorization.

202112435021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28873205010.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 202112435021 its reverse (120534211202), we get a palindrome (322646646223).

The spelling of 202112435021 in words is "two hundred two billion, one hundred twelve million, four hundred thirty-five thousand, twenty-one".