21095931334147 has 2 divisors, whose sum is σ = 21095931334148. Its totient is φ = 21095931334146.

The previous prime is 21095931334129. The next prime is 21095931334201. The reversal of 21095931334147 is 74143313959012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21095931334147 - 2²⁷ = 21095797116419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21095931334094 and 21095931334103.

It is not a weakly prime, because it can be changed into another prime (21095931331147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10547965667073 + 10547965667074.

It is an arithmetic number, because the mean of its divisors is an integer number (10547965667074).

Almost surely, 2^{21095931334147} is an apocalyptic number.

21095931334147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21095931334147 is an equidigital number, since it uses as much as digits as its factorization.

21095931334147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 21095931334147 in words is "twenty-one trillion, ninety-five billion, nine hundred thirty-one million, three hundred thirty-four thousand, one hundred forty-seven".