21276801010 has 32 divisors (see below), whose sum is σ = 40558780080. Its totient is φ = 8008568832.

The previous prime is 21276801001. The next prime is 21276801011. The reversal of 21276801010 is 1010867212.

It can be written as a sum of positive squares in 8 ways, for example, as 5269743649 + 16007057361 = 72593^2 + 126519^2 .

It is a super-2 number, since 2×21276801010² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21276801010.

It is not an unprimeable number, because it can be changed into a prime (21276801011) 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, 1331146 + ... + 1347034.

Almost surely, 2^21276801010 is an apocalyptic number.

21276801010 is a deficient number, since it is larger than the sum of its proper divisors (19281979070).

21276801010 is a wasteful number, since it uses less digits than its factorization.

21276801010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23790.

The product of its (nonzero) digits is 1344, while the sum is 28.

The spelling of 21276801010 in words is "twenty-one billion, two hundred seventy-six million, eight hundred one thousand, ten".