2111101231 has 4 divisors (see below), whose sum is σ = 2112820200. Its totient is φ = 2109382264.

The previous prime is 2111101217. The next prime is 2111101241. The reversal of 2111101231 is 1321011112.

It is a happy number.

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 2111101231 - 2⁷ = 2111101103 is a prime.

It is a super-2 number, since 2×2111101231² = 8913496815059430722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111101241) 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, 857641 + ... + 860098.

It is an arithmetic number, because the mean of its divisors is an integer number (528205050).

Almost surely, 2^2111101231 is an apocalyptic number.

2111101231 is a deficient number, since it is larger than the sum of its proper divisors (1718969).

2111101231 is a wasteful number, since it uses less digits than its factorization.

2111101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718968.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2111101231 is about 45946.7216567189. The cubic root of 2111101231 is about 1282.8317091794.

Adding to 2111101231 its reverse (1321011112), we get a palindrome (3432112343).

The spelling of 2111101231 in words is "two billion, one hundred eleven million, one hundred one thousand, two hundred thirty-one".