20210002121121 has 16 divisors (see below), whose sum is σ = 27090923428800. Its totient is φ = 13401231667200.

The previous prime is 20210002121119. The next prime is 20210002121159. The reversal of 20210002121121 is 12112120001202.

It is not a de Polignac number, because 20210002121121 - 2¹ = 20210002121119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210002121121.

It is not an unprimeable number, because it can be changed into a prime (20210002126121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404905 + ... + 6370553.

It is an arithmetic number, because the mean of its divisors is an integer number (1693182714300).

Almost surely, 2^{20210002121121} is an apocalyptic number.

It is an amenable number.

20210002121121 is a deficient number, since it is larger than the sum of its proper divisors (6880921307679).

20210002121121 is a wasteful number, since it uses less digits than its factorization.

20210002121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971696.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20210002121121 its reverse (12112120001202), we get a palindrome (32322122122323).

The spelling of 20210002121121 in words is "twenty trillion, two hundred ten billion, two million, one hundred twenty-one thousand, one hundred twenty-one".