54121031231 has 2 divisors, whose sum is σ = 54121031232. Its totient is φ = 54121031230.

The previous prime is 54121031221. The next prime is 54121031269. The reversal of 54121031231 is 13213012145.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54121031231 is a prime.

It is a super-2 number, since 2×54121031231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 54121031197 and 54121031206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54121031221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27060515615 + 27060515616.

It is an arithmetic number, because the mean of its divisors is an integer number (27060515616).

Almost surely, 2^54121031231 is an apocalyptic number.

54121031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

54121031231 is an equidigital number, since it uses as much as digits as its factorization.

54121031231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 54121031231 its reverse (13213012145), we get a palindrome (67334043376).

The spelling of 54121031231 in words is "fifty-four billion, one hundred twenty-one million, thirty-one thousand, two hundred thirty-one".