21272021681334 has 16 divisors (see below), whose sum is σ = 42608601858240. Its totient is φ = 7079914144520.

The previous prime is 21272021681311. The next prime is 21272021681363. The reversal of 21272021681334 is 43318612027212.

It is a super-2 number, since 2×21272021681334² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2689933032 + ... + 2689940939.

It is an arithmetic number, because the mean of its divisors is an integer number (2663037616140).

Almost surely, 2^{21272021681334} is an apocalyptic number.

21272021681334 is an abundant number, since it is smaller than the sum of its proper divisors (21336580176906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21272021681334 is a wasteful number, since it uses less digits than its factorization.

21272021681334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379874635.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 21272021681334 in words is "twenty-one trillion, two hundred seventy-two billion, twenty-one million, six hundred eighty-one thousand, three hundred thirty-four".