21011101021010 has 8 divisors (see below), whose sum is σ = 37819981837836. Its totient is φ = 8404440408400.

The previous prime is 21011101020941. The next prime is 21011101021037. The reversal of 21011101021010 is 1012010111012.

It can be written as a sum of positive squares in 2 ways, for example, as 20670216695401 + 340884325609 = 4546451^2 + 583853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21011101021010² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011101020982 and 21011101021000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050555051041 + ... + 1050555051060.

Almost surely, 2^{21011101021010} is an apocalyptic number.

21011101021010 is a deficient number, since it is larger than the sum of its proper divisors (16808880816826).

21011101021010 is a wasteful number, since it uses less digits than its factorization.

21011101021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101110102108.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21011101021010 its reverse (1012010111012), we get a palindrome (22023111132022).

The spelling of 21011101021010 in words is "twenty-one trillion, eleven billion, one hundred one million, twenty-one thousand, ten".