202020010021021 has 16 divisors (see below), whose sum is σ = 203777121484800. Its totient is φ = 200265535170288.

The previous prime is 202020010021009. The next prime is 202020010021069. The reversal of 202020010021021 is 120120010020202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202020010021021 - 2⁵ = 202020010020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020010020992 and 202020010021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020010021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489502616 + ... + 1489638238.

It is an arithmetic number, because the mean of its divisors is an integer number (12736070092800).

Almost surely, 2^{202020010021021} is an apocalyptic number.

It is an amenable number.

202020010021021 is a deficient number, since it is larger than the sum of its proper divisors (1757111463779).

202020010021021 is a wasteful number, since it uses less digits than its factorization.

202020010021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145248.

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

Adding to 202020010021021 its reverse (120120010020202), we get a palindrome (322140020041223).

The spelling of 202020010021021 in words is "two hundred two trillion, twenty billion, ten million, twenty-one thousand, twenty-one".