2121132123121 has 8 divisors (see below), whose sum is σ = 2314301241600. Its totient is φ = 1928019492240.

The previous prime is 2121132123119. The next prime is 2121132123133. The reversal of 2121132123121 is 1213212311212.

It is a happy number.

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 2121132123121 - 2¹ = 2121132123119 is a prime.

It is a super-2 number, since 2×2121132123121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121132123092 and 2121132123101.

It is not an unprimeable number, because it can be changed into a prime (2121132723121) 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, 14043361 + ... + 14193598.

It is an arithmetic number, because the mean of its divisors is an integer number (289287655200).

Almost surely, 2^{2121132123121} is an apocalyptic number.

It is an amenable number.

2121132123121 is a deficient number, since it is larger than the sum of its proper divisors (193169118479).

2121132123121 is a wasteful number, since it uses less digits than its factorization.

2121132123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28243799.

The product of its digits is 288, while the sum is 22.

Adding to 2121132123121 its reverse (1213212311212), we get a palindrome (3334344434333).

The spelling of 2121132123121 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-two million, one hundred twenty-three thousand, one hundred twenty-one".