6216140531421 has 12 divisors (see below), whose sum is σ = 9369255294048. Its totient is φ = 3963915701064.

The previous prime is 6216140531417. The next prime is 6216140531441. The reversal of 6216140531421 is 1241350416126.

6216140531421 is a `hidden beast` number, since 6 + 2 + 1 + 61 + 40 + 531 + 4 + 21 = 666.

It is not a de Polignac number, because 6216140531421 - 2² = 6216140531417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6216140531441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15014831995 + ... + 15014832408.

It is an arithmetic number, because the mean of its divisors is an integer number (780771274504).

Almost surely, 2^{6216140531421} is an apocalyptic number.

It is an amenable number.

6216140531421 is a deficient number, since it is larger than the sum of its proper divisors (3153114762627).

6216140531421 is a wasteful number, since it uses less digits than its factorization.

6216140531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30029664432 (or 30029664429 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 6216140531421 its reverse (1241350416126), we get a palindrome (7457490947547).

The spelling of 6216140531421 in words is "six trillion, two hundred sixteen billion, one hundred forty million, five hundred thirty-one thousand, four hundred twenty-one".