2121122012011 has 4 divisors (see below), whose sum is σ = 2122587889072. Its totient is φ = 2119656134952.

The previous prime is 2121122011997. The next prime is 2121122012083. The reversal of 2121122012011 is 1102102211212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121122012011 - 2²³ = 2121113623403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121122013011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732936360 + ... + 732939253.

It is an arithmetic number, because the mean of its divisors is an integer number (530646972268).

Almost surely, 2^{2121122012011} is an apocalyptic number.

2121122012011 is a deficient number, since it is larger than the sum of its proper divisors (1465877061).

2121122012011 is a wasteful number, since it uses less digits than its factorization.

2121122012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465877060.

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

Adding to 2121122012011 its reverse (1102102211212), we get a palindrome (3223224223223).

The spelling of 2121122012011 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, twelve thousand, eleven".