211122301231 has 4 divisors (see below), whose sum is σ = 211139084200. Its totient is φ = 211105518264.

The previous prime is 211122301223. The next prime is 211122301289. The reversal of 211122301231 is 132103221112.

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 211122301231 - 2³ = 211122301223 is a prime.

It is a super-2 number, since 2×211122301231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211122301199 and 211122301208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122301031) 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, 8372601 + ... + 8397778.

It is an arithmetic number, because the mean of its divisors is an integer number (52784771050).

Almost surely, 2^211122301231 is an apocalyptic number.

211122301231 is a deficient number, since it is larger than the sum of its proper divisors (16782969).

211122301231 is a wasteful number, since it uses less digits than its factorization.

211122301231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16782968.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211122301231 its reverse (132103221112), we get a palindrome (343225522343).

The spelling of 211122301231 in words is "two hundred eleven billion, one hundred twenty-two million, three hundred one thousand, two hundred thirty-one".