20210220002121 has 8 divisors (see below), whose sum is σ = 28532075297184. Its totient is φ = 12680922354240.

The previous prime is 20210220002099. The next prime is 20210220002123. The reversal of 20210220002121 is 12120002201202.

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

It is not a de Polignac number, because 20210220002121 - 2²⁶ = 20210152893257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210220002121.

It is not an unprimeable number, because it can be changed into a prime (20210220002123) 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, 198139411735 + ... + 198139411836.

It is an arithmetic number, because the mean of its divisors is an integer number (3566509412148).

Almost surely, 2^{20210220002121} is an apocalyptic number.

It is an amenable number.

20210220002121 is a deficient number, since it is larger than the sum of its proper divisors (8321855295063).

20210220002121 is a wasteful number, since it uses less digits than its factorization.

20210220002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396278823591.

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

Adding to 20210220002121 its reverse (12120002201202), we get a palindrome (32330222203323).

The spelling of 20210220002121 in words is "twenty trillion, two hundred ten billion, two hundred twenty million, two thousand, one hundred twenty-one".