202301020021 has 4 divisors (see below), whose sum is σ = 204738381792. Its totient is φ = 199863658252.

The previous prime is 202301020001. The next prime is 202301020043. The reversal of 202301020021 is 120020103202.

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 202301020021 - 2¹⁵ = 202300987253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202301019983 and 202301020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202301020001) 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, 1218680761 + ... + 1218680926.

It is an arithmetic number, because the mean of its divisors is an integer number (51184595448).

Almost surely, 2^202301020021 is an apocalyptic number.

It is an amenable number.

202301020021 is a deficient number, since it is larger than the sum of its proper divisors (2437361771).

202301020021 is an equidigital number, since it uses as much as digits as its factorization.

202301020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437361770.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 202301020021 its reverse (120020103202), we get a palindrome (322321123223).

The spelling of 202301020021 in words is "two hundred two billion, three hundred one million, twenty thousand, twenty-one".