2121122263205 has 32 divisors (see below), whose sum is σ = 2787327110016. Its totient is φ = 1536756480000.

The previous prime is 2121122263199. The next prime is 2121122263223. The reversal of 2121122263205 is 5023622211212.

It is a happy number.

It is not a de Polignac number, because 2121122263205 - 2⁸ = 2121122262949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70475210 + ... + 70505300.

It is an arithmetic number, because the mean of its divisors is an integer number (87103972188).

Almost surely, 2^{2121122263205} is an apocalyptic number.

It is an amenable number.

2121122263205 is a deficient number, since it is larger than the sum of its proper divisors (666204846811).

2121122263205 is a wasteful number, since it uses less digits than its factorization.

2121122263205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34949.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 2121122263205 its reverse (5023622211212), we get a palindrome (7144744474417).

The spelling of 2121122263205 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred sixty-three thousand, two hundred five".