2211123123231 has 16 divisors (see below), whose sum is σ = 3327081816960. Its totient is φ = 1293865149920.

The previous prime is 2211123123229. The next prime is 2211123123259. The reversal of 2211123123231 is 1323213211122.

It is a cyclic number.

It is not a de Polignac number, because 2211123123231 - 2¹ = 2211123123229 is a prime.

It is a super-2 number, since 2×2211123123231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211123123631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155235785 + ... + 1155237698.

It is an arithmetic number, because the mean of its divisors is an integer number (207942613560).

Almost surely, 2^{2211123123231} is an apocalyptic number.

2211123123231 is a deficient number, since it is larger than the sum of its proper divisors (1115958693729).

2211123123231 is a wasteful number, since it uses less digits than its factorization.

2211123123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310473526.

The product of its digits is 864, while the sum is 24.

Adding to 2211123123231 its reverse (1323213211122), we get a palindrome (3534336334353).

The spelling of 2211123123231 in words is "two trillion, two hundred eleven billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred thirty-one".