202021423221 has 8 divisors (see below), whose sum is σ = 273927353760. Its totient is φ = 132398220752.

The previous prime is 202021423213. The next prime is 202021423229. The reversal of 202021423221 is 122324120202.

It is an interprime number because it is at equal distance from previous prime (202021423213) and next prime (202021423229).

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 202021423221 - 2³ = 202021423213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021423229) 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, 570681810 + ... + 570682163.

It is an arithmetic number, because the mean of its divisors is an integer number (34240919220).

Almost surely, 2^202021423221 is an apocalyptic number.

It is an amenable number.

202021423221 is a deficient number, since it is larger than the sum of its proper divisors (71905930539).

202021423221 is a wasteful number, since it uses less digits than its factorization.

202021423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141364035.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 202021423221 its reverse (122324120202), we get a palindrome (324345543423).

The spelling of 202021423221 in words is "two hundred two billion, twenty-one million, four hundred twenty-three thousand, two hundred twenty-one".