202113212321 has 4 divisors (see below), whose sum is σ = 202143480000. Its totient is φ = 202082944644.

The previous prime is 202113212299. The next prime is 202113212351. The reversal of 202113212321 is 123212311202.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202113212321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202113212293 and 202113212302.

It is not an unprimeable number, because it can be changed into a prime (202113212351) 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, 15123821 + ... + 15137178.

It is an arithmetic number, because the mean of its divisors is an integer number (50535870000).

Almost surely, 2^202113212321 is an apocalyptic number.

It is an amenable number.

202113212321 is a deficient number, since it is larger than the sum of its proper divisors (30267679).

202113212321 is an equidigital number, since it uses as much as digits as its factorization.

202113212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30267678.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 202113212321 its reverse (123212311202), we get a palindrome (325325523523).

The spelling of 202113212321 in words is "two hundred two billion, one hundred thirteen million, two hundred twelve thousand, three hundred twenty-one".