2121001111121 has 8 divisors (see below), whose sum is σ = 2194344022080. Its totient is φ = 2047671862992.

The previous prime is 2121001111109. The next prime is 2121001111133. The reversal of 2121001111121 is 1211111001212.

It is an interprime number because it is at equal distance from previous prime (2121001111109) and next prime (2121001111133).

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 2121001111121 - 2³⁴ = 2103821241937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121001111096 and 2121001111105.

It is not an unprimeable number, because it can be changed into a prime (2121001111181) 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, 3099365 + ... + 3721298.

It is an arithmetic number, because the mean of its divisors is an integer number (274293002760).

Almost surely, 2^{2121001111121} is an apocalyptic number.

It is an amenable number.

2121001111121 is a deficient number, since it is larger than the sum of its proper divisors (73342910959).

2121001111121 is a wasteful number, since it uses less digits than its factorization.

2121001111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831415.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2121001111121 its reverse (1211111001212), we get a palindrome (3332112112333).

The spelling of 2121001111121 in words is "two trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, one hundred twenty-one".