2111220231 has 8 divisors (see below), whose sum is σ = 2818662384. Its totient is φ = 1405629120.

The previous prime is 2111220227. The next prime is 2111220239. The reversal of 2111220231 is 1320221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111220231 - 2² = 2111220227 is a prime.

It is a super-2 number, since 2×2111220231² = 8914501727567386722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111220231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111220239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460096 + ... + 464661.

It is an arithmetic number, because the mean of its divisors is an integer number (352332798).

Almost surely, 2^2111220231 is an apocalyptic number.

2111220231 is a deficient number, since it is larger than the sum of its proper divisors (707442153).

2111220231 is an equidigital number, since it uses as much as digits as its factorization.

2111220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925521.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2111220231 is about 45948.0166166071. The cubic root of 2111220231 is about 1282.8558125719.

Adding to 2111220231 its reverse (1320221112), we get a palindrome (3431441343).

The spelling of 2111220231 in words is "two billion, one hundred eleven million, two hundred twenty thousand, two hundred thirty-one".