21065207211130 has 8 divisors (see below), whose sum is σ = 37917372980052. Its totient is φ = 8426082884448.

The previous prime is 21065207211127. The next prime is 21065207211143. The reversal of 21065207211130 is 3111270256012.

It can be written as a sum of positive squares in 2 ways, for example, as 19810074624201 + 1255132586929 = 4450851^2 + 1120327^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21065207211092 and 21065207211101.

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, 1053260360547 + ... + 1053260360566.

Almost surely, 2^{21065207211130} is an apocalyptic number.

21065207211130 is a deficient number, since it is larger than the sum of its proper divisors (16852165768922).

21065207211130 is a wasteful number, since it uses less digits than its factorization.

21065207211130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106520721120.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 21065207211130 its reverse (3111270256012), we get a palindrome (24176477467142).

The spelling of 21065207211130 in words is "twenty-one trillion, sixty-five billion, two hundred seven million, two hundred eleven thousand, one hundred thirty".