20211202002121 has 16 divisors (see below), whose sum is σ = 21884899365504. Its totient is φ = 18554558045184.

The previous prime is 20211202002071. The next prime is 20211202002193. The reversal of 20211202002121 is 12120020211202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20211202002121 - 2⁹ = 20211202001609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211202002095 and 20211202002104.

It is not an unprimeable number, because it can be changed into a prime (20211202002721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7707270 + ... + 9991216.

It is an arithmetic number, because the mean of its divisors is an integer number (1367806210344).

Almost surely, 2^{20211202002121} is an apocalyptic number.

It is an amenable number.

20211202002121 is a deficient number, since it is larger than the sum of its proper divisors (1673697363383).

20211202002121 is a wasteful number, since it uses less digits than its factorization.

20211202002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287680.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211202002121 its reverse (12120020211202), we get a palindrome (32331222213323).

The spelling of 20211202002121 in words is "twenty trillion, two hundred eleven billion, two hundred two million, two thousand, one hundred twenty-one".