231121201451 has 16 divisors (see below), whose sum is σ = 264458338560. Its totient is φ = 197864184480.

The previous prime is 231121201439. The next prime is 231121201477. The reversal of 231121201451 is 154102121132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231121201451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231121203451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22966961 + ... + 22977021.

It is an arithmetic number, because the mean of its divisors is an integer number (16528646160).

Almost surely, 2^231121201451 is an apocalyptic number.

231121201451 is a deficient number, since it is larger than the sum of its proper divisors (33337137109).

231121201451 is a wasteful number, since it uses less digits than its factorization.

231121201451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13714.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 231121201451 its reverse (154102121132), we get a palindrome (385223322583).

The spelling of 231121201451 in words is "two hundred thirty-one billion, one hundred twenty-one million, two hundred one thousand, four hundred fifty-one".