202101223021 has 8 divisors (see below), whose sum is σ = 208662476544. Its totient is φ = 195542585760.

The previous prime is 202101222971. The next prime is 202101223061. The reversal of 202101223021 is 120322101202.

It is a happy number.

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 202101223021 - 2⁹ = 202101222509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101222986 and 202101223004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101223061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496456 + ... + 806641.

It is an arithmetic number, because the mean of its divisors is an integer number (26082809568).

Almost surely, 2^202101223021 is an apocalyptic number.

It is an amenable number.

202101223021 is a deficient number, since it is larger than the sum of its proper divisors (6561253523).

202101223021 is a wasteful number, since it uses less digits than its factorization.

202101223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308131.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202101223021 its reverse (120322101202), we get a palindrome (322423324223).

The spelling of 202101223021 in words is "two hundred two billion, one hundred one million, two hundred twenty-three thousand, twenty-one".