5211231355421 has 16 divisors (see below), whose sum is σ = 6414130015104. Its totient is φ = 4122974827584.

The previous prime is 5211231355417. The next prime is 5211231355427. The reversal of 5211231355421 is 1245531321125.

It is a cyclic number.

It is not a de Polignac number, because 5211231355421 - 2² = 5211231355417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211231355427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557951 + ... + 3276243.

It is an arithmetic number, because the mean of its divisors is an integer number (400883125944).

Almost surely, 2^{5211231355421} is an apocalyptic number.

It is an amenable number.

5211231355421 is a deficient number, since it is larger than the sum of its proper divisors (1202898659683).

5211231355421 is a wasteful number, since it uses less digits than its factorization.

5211231355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739380.

The product of its digits is 36000, while the sum is 35.

Adding to 5211231355421 its reverse (1245531321125), we get a palindrome (6456762676546).

The spelling of 5211231355421 in words is "five trillion, two hundred eleven billion, two hundred thirty-one million, three hundred fifty-five thousand, four hundred twenty-one".