2120211202021 has 4 divisors (see below), whose sum is σ = 2312957674944. Its totient is φ = 1927464729100.

The previous prime is 2120211202001. The next prime is 2120211202061. The reversal of 2120211202021 is 1202021120212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120211202021 - 2²⁵ = 2120177647589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120211201986 and 2120211202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96373236445 + ... + 96373236466.

It is an arithmetic number, because the mean of its divisors is an integer number (578239418736).

Almost surely, 2^{2120211202021} is an apocalyptic number.

It is an amenable number.

2120211202021 is a deficient number, since it is larger than the sum of its proper divisors (192746472923).

2120211202021 is a wasteful number, since it uses less digits than its factorization.

2120211202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192746472922.

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

Adding to 2120211202021 its reverse (1202021120212), we get a palindrome (3322232322233).

It can be divided in two parts, 2120211 and 202021, that added together give a palindrome (2322232).

The spelling of 2120211202021 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred two thousand, twenty-one".