20321112321211 has 4 divisors (see below), whose sum is σ = 21884274807472. Its totient is φ = 18757949834952.

The previous prime is 20321112321187. The next prime is 20321112321221. The reversal of 20321112321211 is 11212321112302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20321112321211 - 2⁹ = 20321112320699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321112321221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781581243111 + ... + 781581243136.

It is an arithmetic number, because the mean of its divisors is an integer number (5471068701868).

Almost surely, 2^{20321112321211} is an apocalyptic number.

20321112321211 is a deficient number, since it is larger than the sum of its proper divisors (1563162486261).

20321112321211 is a wasteful number, since it uses less digits than its factorization.

20321112321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563162486260.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20321112321211 its reverse (11212321112302), we get a palindrome (31533433433513).

The spelling of 20321112321211 in words is "twenty trillion, three hundred twenty-one billion, one hundred twelve million, three hundred twenty-one thousand, two hundred eleven".