2111221330231 has 4 divisors (see below), whose sum is σ = 2273622971032. Its totient is φ = 1948819689432.

The previous prime is 2111221330171. The next prime is 2111221330247. The reversal of 2111221330231 is 1320331221112.

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 2111221330231 - 2⁹ = 2111221329719 is a prime.

It is a super-2 number, since 2×2111221330231² (a number of 25 digits) 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 (2111221330271) 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, 81200820381 + ... + 81200820406.

It is an arithmetic number, because the mean of its divisors is an integer number (568405742758).

Almost surely, 2^{2111221330231} is an apocalyptic number.

2111221330231 is a deficient number, since it is larger than the sum of its proper divisors (162401640801).

2111221330231 is a wasteful number, since it uses less digits than its factorization.

2111221330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162401640800.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2111221330231 its reverse (1320331221112), we get a palindrome (3431552551343).

The spelling of 2111221330231 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, three hundred thirty thousand, two hundred thirty-one".