2121210112021 has 64 divisors (see below), whose sum is σ = 3079753850880. Its totient is φ = 1405442165760.

The previous prime is 2121210112001. The next prime is 2121210112037. The reversal of 2121210112021 is 1202110121212.

It is a cyclic number.

It is not a de Polignac number, because 2121210112021 - 2⁵ = 2121210111989 is a prime.

It is a super-3 number, since 3×2121210112021³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121210111986 and 2121210112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121210112001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 526291 + ... + 2125888.

It is an arithmetic number, because the mean of its divisors is an integer number (48121153920).

Almost surely, 2^{2121210112021} is an apocalyptic number.

It is an amenable number.

2121210112021 is a deficient number, since it is larger than the sum of its proper divisors (958543738859).

2121210112021 is a wasteful number, since it uses less digits than its factorization.

2121210112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652274.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121210112021 its reverse (1202110121212), we get a palindrome (3323320233233).

The spelling of 2121210112021 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, twenty-one".