2121010221121 has 8 divisors (see below), whose sum is σ = 2330475588000. Its totient is φ = 1914319230240.

The previous prime is 2121010221089. The next prime is 2121010221139. The reversal of 2121010221121 is 1211220101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121010221121 - 2⁵ = 2121010221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121010221095 and 2121010221104.

It is not an unprimeable number, because it can be changed into a prime (2121010221521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693592396 + ... + 693595453.

It is an arithmetic number, because the mean of its divisors is an integer number (291309448500).

Almost surely, 2^{2121010221121} is an apocalyptic number.

It is an amenable number.

2121010221121 is a deficient number, since it is larger than the sum of its proper divisors (209465366879).

2121010221121 is a wasteful number, since it uses less digits than its factorization.

2121010221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387187999.

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

Adding to 2121010221121 its reverse (1211220101212), we get a palindrome (3332230322333).

The spelling of 2121010221121 in words is "two trillion, one hundred twenty-one billion, ten million, two hundred twenty-one thousand, one hundred twenty-one".