21077227144065 has 16 divisors (see below), whose sum is σ = 34295149252800. Its totient is φ = 11050659202752.

The previous prime is 21077227144063. The next prime is 21077227144069. The reversal of 21077227144065 is 56044172277012.

It is not a de Polignac number, because 21077227144065 - 2¹ = 21077227144063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21077227144063) 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, 11908037050 + ... + 11908038819.

It is an arithmetic number, because the mean of its divisors is an integer number (2143446828300).

Almost surely, 2^{21077227144065} is an apocalyptic number.

It is an amenable number.

21077227144065 is a deficient number, since it is larger than the sum of its proper divisors (13217922108735).

21077227144065 is a wasteful number, since it uses less digits than its factorization.

21077227144065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23816075936.

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 21077227144065 in words is "twenty-one trillion, seventy-seven billion, two hundred twenty-seven million, one hundred forty-four thousand, sixty-five".