21227386175755 has 4 divisors (see below), whose sum is σ = 25472863410912. Its totient is φ = 16981908940600.

The previous prime is 21227386175711. The next prime is 21227386175773. The reversal of 21227386175755 is 55757168372212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21227386175755 - 2¹³ = 21227386167563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21227386175693 and 21227386175702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122738617571 + ... + 2122738617580.

It is an arithmetic number, because the mean of its divisors is an integer number (6368215852728).

Almost surely, 2^{21227386175755} is an apocalyptic number.

21227386175755 is a deficient number, since it is larger than the sum of its proper divisors (4245477235157).

21227386175755 is an equidigital number, since it uses as much as digits as its factorization.

21227386175755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245477235156.

The product of its digits is 49392000, while the sum is 61.

The spelling of 21227386175755 in words is "twenty-one trillion, two hundred twenty-seven billion, three hundred eighty-six million, one hundred seventy-five thousand, seven hundred fifty-five".