202101022021 has 8 divisors (see below), whose sum is σ = 214745468544. Its totient is φ = 189540592320.

The previous prime is 202101021973. The next prime is 202101022063. The reversal of 202101022021 is 120220101202.

It is a happy number.

202101022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202101022021 - 2¹⁵ = 202100989253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101021992 and 202101022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101022121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20999245 + ... + 21008866.

It is an arithmetic number, because the mean of its divisors is an integer number (26843183568).

Almost surely, 2^202101022021 is an apocalyptic number.

It is an amenable number.

202101022021 is a deficient number, since it is larger than the sum of its proper divisors (12644446523).

202101022021 is a wasteful number, since it uses less digits than its factorization.

202101022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42008411.

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

Adding to 202101022021 its reverse (120220101202), we get a palindrome (322321123223).

The spelling of 202101022021 in words is "two hundred two billion, one hundred one million, twenty-two thousand, twenty-one".