2121000022111 has 8 divisors (see below), whose sum is σ = 2245781532384. Its totient is φ = 1996220378880.

The previous prime is 2121000022069. The next prime is 2121000022121. The reversal of 2121000022111 is 1112200001212.

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 2121000022111 - 2⁹ = 2121000021599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121000022091 and 2121000022100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000022121) 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, 2361966 + ... + 3133828.

It is an arithmetic number, because the mean of its divisors is an integer number (280722691548).

Almost surely, 2^{2121000022111} is an apocalyptic number.

2121000022111 is a deficient number, since it is larger than the sum of its proper divisors (124781510273).

2121000022111 is a wasteful number, since it uses less digits than its factorization.

2121000022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933521.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121000022111 its reverse (1112200001212), we get a palindrome (3233200023323).

The spelling of 2121000022111 in words is "two trillion, one hundred twenty-one billion, twenty-two thousand, one hundred eleven".