202120102021 has 8 divisors (see below), whose sum is σ = 208652661504. Its totient is φ = 195588327360.

The previous prime is 202120102007. The next prime is 202120102049. The reversal of 202120102021 is 120201021202.

It is a happy number.

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 202120102021 - 2¹⁹ = 202119577733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202120101992 and 202120102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120102001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351501 + ... + 726493.

It is an arithmetic number, because the mean of its divisors is an integer number (26081582688).

Almost surely, 2^202120102021 is an apocalyptic number.

It is an amenable number.

202120102021 is a deficient number, since it is larger than the sum of its proper divisors (6532559483).

202120102021 is a wasteful number, since it uses less digits than its factorization.

202120102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392411.

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

Adding to 202120102021 its reverse (120201021202), we get a palindrome (322321123223).

The spelling of 202120102021 in words is "two hundred two billion, one hundred twenty million, one hundred two thousand, twenty-one".