202120010421 has 8 divisors (see below), whose sum is σ = 307992396864. Its totient is φ = 115497148800.

The previous prime is 202120010401. The next prime is 202120010431. The reversal of 202120010421 is 124010021202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202120010421 - 2¹⁹ = 202119486133 is a prime.

It is a super-2 number, since 2×202120010421² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202120010421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120010401) 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, 4812381180 + ... + 4812381221.

It is an arithmetic number, because the mean of its divisors is an integer number (38499049608).

Almost surely, 2^202120010421 is an apocalyptic number.

202120010421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202120010421 is a deficient number, since it is larger than the sum of its proper divisors (105872386443).

202120010421 is an equidigital number, since it uses as much as digits as its factorization.

202120010421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624762411.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202120010421 its reverse (124010021202), we get a palindrome (326130031623).

The spelling of 202120010421 in words is "two hundred two billion, one hundred twenty million, ten thousand, four hundred twenty-one".