2123210311211 has 4 divisors (see below), whose sum is σ = 2316229430424. Its totient is φ = 1930191192000.

The previous prime is 2123210311207. The next prime is 2123210311237. The reversal of 2123210311211 is 1121130123212.

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 2123210311211 - 2² = 2123210311207 is a prime.

It is a super-2 number, since 2×2123210311211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123210311241) 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, 96509559590 + ... + 96509559611.

It is an arithmetic number, because the mean of its divisors is an integer number (579057357606).

Almost surely, 2^{2123210311211} is an apocalyptic number.

2123210311211 is a deficient number, since it is larger than the sum of its proper divisors (193019119213).

2123210311211 is a wasteful number, since it uses less digits than its factorization.

2123210311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193019119212.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2123210311211 its reverse (1121130123212), we get a palindrome (3244340434423).

The spelling of 2123210311211 in words is "two trillion, one hundred twenty-three billion, two hundred ten million, three hundred eleven thousand, two hundred eleven".