231212023203 has 32 divisors (see below), whose sum is σ = 375463673856. Its totient is φ = 123687878688.

The previous prime is 231212023183. The next prime is 231212023219. The reversal of 231212023203 is 302320212132.

It is a happy number.

It is not a de Polignac number, because 231212023203 - 2⁶ = 231212023139 is a prime.

It is a super-2 number, since 2×231212023203² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 231212023203.

It is not an unprimeable number, because it can be changed into a prime (231212023303) 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, 5069851 + ... + 5115252.

It is an arithmetic number, because the mean of its divisors is an integer number (11733239808).

Almost surely, 2^231212023203 is an apocalyptic number.

231212023203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231212023203 is a deficient number, since it is larger than the sum of its proper divisors (144251650653).

231212023203 is a wasteful number, since it uses less digits than its factorization.

231212023203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185183.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231212023203 its reverse (302320212132), we get a palindrome (533532235335).

The spelling of 231212023203 in words is "two hundred thirty-one billion, two hundred twelve million, twenty-three thousand, two hundred three".