11312120231 has 8 divisors (see below), whose sum is σ = 11909972400. Its totient is φ = 10714515840.

The previous prime is 11312120207. The next prime is 11312120279. The reversal of 11312120231 is 13202121311.

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

It is a cyclic number.

It is not a de Polignac number, because 11312120231 - 2¹⁸ = 11311858087 is a prime.

It is a super-2 number, since 2×11312120231² (a number of 21 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 (11312120531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35741 + ... + 154601.

It is an arithmetic number, because the mean of its divisors is an integer number (1488746550).

Almost surely, 2^11312120231 is an apocalyptic number.

11312120231 is a deficient number, since it is larger than the sum of its proper divisors (597852169).

11312120231 is a wasteful number, since it uses less digits than its factorization.

11312120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123889.

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

Adding to 11312120231 its reverse (13202121311), we get a palindrome (24514241542).

The spelling of 11312120231 in words is "eleven billion, three hundred twelve million, one hundred twenty thousand, two hundred thirty-one".