202021000101 has 20 divisors (see below), whose sum is σ = 301888550700. Its totient is φ = 134634211776.

The previous prime is 202021000087. The next prime is 202021000117. The reversal of 202021000101 is 101000120202.

It can be written as a sum of positive squares in 2 ways, for example, as 120599231076 + 81421769025 = 347274^2 + 285345^2 .

It is not a de Polignac number, because 202021000101 - 2⁹ = 202020999589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021000141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 193056 + ... + 664313.

It is an arithmetic number, because the mean of its divisors is an integer number (15094427535).

Almost surely, 2^202021000101 is an apocalyptic number.

It is an amenable number.

202021000101 is a deficient number, since it is larger than the sum of its proper divisors (99867550599).

202021000101 is an equidigital number, since it uses as much as digits as its factorization.

202021000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860290 (or 860281 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 202021000101 its reverse (101000120202), we get a palindrome (303021120303).

The spelling of 202021000101 in words is "two hundred two billion, twenty-one million, one hundred one", and thus it is an aban number.