2121211020121 has 16 divisors (see below), whose sum is σ = 2154338823168. Its totient is φ = 2088175320000.

The previous prime is 2121211020119. The next prime is 2121211020133. The reversal of 2121211020121 is 1210201121212.

It is not a de Polignac number, because 2121211020121 - 2¹ = 2121211020119 is a prime.

It is a super-3 number, since 3×2121211020121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121211020095 and 2121211020104.

It is not an unprimeable number, because it can be changed into a prime (2121211020101) 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, 333153880 + ... + 333160246.

It is an arithmetic number, because the mean of its divisors is an integer number (134646176448).

Almost surely, 2^{2121211020121} is an apocalyptic number.

It is an amenable number.

2121211020121 is a deficient number, since it is larger than the sum of its proper divisors (33127803047).

2121211020121 is an equidigital number, since it uses as much as digits as its factorization.

2121211020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12792.

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

Adding to 2121211020121 its reverse (1210201121212), we get a palindrome (3331412141333).

The spelling of 2121211020121 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, twenty thousand, one hundred twenty-one".