202020221021 has 8 divisors (see below), whose sum is σ = 213956277120. Its totient is φ = 190089999808.

The previous prime is 202020220981. The next prime is 202020221023. The reversal of 202020221021 is 120122020202.

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 202020221021 - 2⁶ = 202020220957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202020220987 and 202020221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020221023) 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, 1387331 + ... + 1526016.

It is an arithmetic number, because the mean of its divisors is an integer number (26744534640).

Almost surely, 2^202020221021 is an apocalyptic number.

It is an amenable number.

202020221021 is a deficient number, since it is larger than the sum of its proper divisors (11936056099).

202020221021 is a wasteful number, since it uses less digits than its factorization.

202020221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917443.

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

Adding to 202020221021 its reverse (120122020202), we get a palindrome (322142241223).

The spelling of 202020221021 in words is "two hundred two billion, twenty million, two hundred twenty-one thousand, twenty-one".