211103021231 has 8 divisors (see below), whose sum is σ = 214714054800. Its totient is φ = 207493088320.

The previous prime is 211103021201. The next prime is 211103021263. The reversal of 211103021231 is 132120301112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211103021231 is a prime.

It is a super-2 number, since 2×211103021231² (a number of 23 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 (211103021201) 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, 116435 + ... + 660123.

It is an arithmetic number, because the mean of its divisors is an integer number (26839256850).

Almost surely, 2^211103021231 is an apocalyptic number.

211103021231 is a deficient number, since it is larger than the sum of its proper divisors (3611033569).

211103021231 is an equidigital number, since it uses as much as digits as its factorization.

211103021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550329.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211103021231 its reverse (132120301112), we get a palindrome (343223322343).

The spelling of 211103021231 in words is "two hundred eleven billion, one hundred three million, twenty-one thousand, two hundred thirty-one".