21312120102211 has 16 divisors (see below), whose sum is σ = 21901938639840. Its totient is φ = 20725642264320.

The previous prime is 21312120102199. The next prime is 21312120102241. The reversal of 21312120102211 is 11220102121312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312120102211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312120102241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379211365 + ... + 379267561.

It is an arithmetic number, because the mean of its divisors is an integer number (1368871164990).

Almost surely, 2^{21312120102211} is an apocalyptic number.

21312120102211 is a deficient number, since it is larger than the sum of its proper divisors (589818537629).

21312120102211 is a wasteful number, since it uses less digits than its factorization.

21312120102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85734.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21312120102211 its reverse (11220102121312), we get a palindrome (32532222223523).

The spelling of 21312120102211 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty million, one hundred two thousand, two hundred eleven".