202201201021 has 4 divisors (see below), whose sum is σ = 202376876544. Its totient is φ = 202025525500.

The previous prime is 202201201009. The next prime is 202201201031. The reversal of 202201201021 is 120102102202.

It is a happy number.

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 not a de Polignac number, because 202201201021 - 2⁷ = 202201200893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202201200992 and 202201201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202201201031) 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, 87836035 + ... + 87838336.

It is an arithmetic number, because the mean of its divisors is an integer number (50594219136).

Almost surely, 2^202201201021 is an apocalyptic number.

It is an amenable number.

202201201021 is a deficient number, since it is larger than the sum of its proper divisors (175675523).

202201201021 is a wasteful number, since it uses less digits than its factorization.

202201201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175675522.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202201201021 its reverse (120102102202), we get a palindrome (322303303223).

The spelling of 202201201021 in words is "two hundred two billion, two hundred one million, two hundred one thousand, twenty-one".