231111212003 has 32 divisors (see below), whose sum is σ = 274337280000. Its totient is φ = 194573692320.

The previous prime is 231111211993. The next prime is 231111212027. The reversal of 231111212003 is 300212111132.

It is not a de Polignac number, because 231111212003 - 2¹⁶ = 231111146467 is a prime.

It is a super-2 number, since 2×231111212003² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231111212083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6533318 + ... + 6568596.

It is an arithmetic number, because the mean of its divisors is an integer number (8573040000).

Almost surely, 2^231111212003 is an apocalyptic number.

231111212003 is a deficient number, since it is larger than the sum of its proper divisors (43226067997).

231111212003 is an equidigital number, since it uses as much as digits as its factorization.

231111212003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35640 (or 35626 counting only the distinct ones).

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

Adding to 231111212003 its reverse (300212111132), we get a palindrome (531323323135).

The spelling of 231111212003 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred twelve thousand, three".