21277231150681 has 32 divisors (see below), whose sum is σ = 24861671366400. Its totient is φ = 17994324142080.

The previous prime is 21277231150667. The next prime is 21277231150697. The reversal of 21277231150681 is 18605113277212.

It is not a de Polignac number, because 21277231150681 - 2⁹ = 21277231150169 is a prime.

It is a super-2 number, since 2×21277231150681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21277231150381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48094435 + ... + 48534823.

It is an arithmetic number, because the mean of its divisors is an integer number (776927230200).

Almost surely, 2^{21277231150681} is an apocalyptic number.

It is an amenable number.

21277231150681 is a deficient number, since it is larger than the sum of its proper divisors (3584440215719).

21277231150681 is a wasteful number, since it uses less digits than its factorization.

21277231150681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443409.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 21277231150681 in words is "twenty-one trillion, two hundred seventy-seven billion, two hundred thirty-one million, one hundred fifty thousand, six hundred eighty-one".