21312011112211 has 32 divisors (see below), whose sum is σ = 22796084054016. Its totient is φ = 19854749376000.

The previous prime is 21312011112181. The next prime is 21312011112221. The reversal of 21312011112211 is 11221111021312.

It is a cyclic number.

It is not a de Polignac number, because 21312011112211 - 2⁷ = 21312011112083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312011112221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 872679781 + ... + 872704201.

It is an arithmetic number, because the mean of its divisors is an integer number (712377626688).

Almost surely, 2^{21312011112211} is an apocalyptic number.

21312011112211 is a deficient number, since it is larger than the sum of its proper divisors (1484072941805).

21312011112211 is a wasteful number, since it uses less digits than its factorization.

21312011112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25963.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 21312011112211 its reverse (11221111021312), we get a palindrome (32533122133523).

The spelling of 21312011112211 in words is "twenty-one trillion, three hundred twelve billion, eleven million, one hundred twelve thousand, two hundred eleven".