21272277067 has 2 divisors, whose sum is σ = 21272277068. Its totient is φ = 21272277066.

The previous prime is 21272277043. The next prime is 21272277101. The reversal of 21272277067 is 76077227212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21272277067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21272277167) 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 as a sum of consecutive naturals, namely, 10636138533 + 10636138534.

It is an arithmetic number, because the mean of its divisors is an integer number (10636138534).

Almost surely, 2^21272277067 is an apocalyptic number.

21272277067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21272277067 is an equidigital number, since it uses as much as digits as its factorization.

21272277067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 21272277067 in words is "twenty-one billion, two hundred seventy-two million, two hundred seventy-seven thousand, sixty-seven".