202021022021 has 24 divisors (see below), whose sum is σ = 252927341184. Its totient is φ = 157131396000.

The previous prime is 202021021967. The next prime is 202021022069. The reversal of 202021022021 is 120220120202.

It is not a de Polignac number, because 202021022021 - 2⁶ = 202021021957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202021021987 and 202021022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021022221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2105 + ... + 635646.

It is an arithmetic number, because the mean of its divisors is an integer number (10538639216).

Almost surely, 2^202021022021 is an apocalyptic number.

It is an amenable number.

202021022021 is a deficient number, since it is larger than the sum of its proper divisors (50906319163).

202021022021 is an equidigital number, since it uses as much as digits as its factorization.

202021022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637889 (or 637830 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202021022021 its reverse (120220120202), we get a palindrome (322241142223).

The spelling of 202021022021 in words is "two hundred two billion, twenty-one million, twenty-two thousand, twenty-one".