202143221021 has 16 divisors (see below), whose sum is σ = 231622949376. Its totient is φ = 172814373936.

The previous prime is 202143220997. The next prime is 202143221029. The reversal of 202143221021 is 120122341202.

It is a cyclic number.

It is not a de Polignac number, because 202143221021 - 2³⁰ = 201069479197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202143220984 and 202143221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202143221029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7659170 + ... + 7685516.

It is an arithmetic number, because the mean of its divisors is an integer number (14476434336).

Almost surely, 2^202143221021 is an apocalyptic number.

It is an amenable number.

202143221021 is a deficient number, since it is larger than the sum of its proper divisors (29479728355).

202143221021 is a wasteful number, since it uses less digits than its factorization.

202143221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29168.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 202143221021 its reverse (120122341202), we get a palindrome (322265562223).

The spelling of 202143221021 in words is "two hundred two billion, one hundred forty-three million, two hundred twenty-one thousand, twenty-one".