21011321212233 has 16 divisors (see below), whose sum is σ = 30876993126336. Its totient is φ = 12602854333440.

The previous prime is 21011321212153. The next prime is 21011321212289. The reversal of 21011321212233 is 33221212311012.

It is not a de Polignac number, because 21011321212233 - 2⁸ = 21011321211977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011321212433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3281990116 + ... + 3281996517.

It is an arithmetic number, because the mean of its divisors is an integer number (1929812070396).

Almost surely, 2^{21011321212233} is an apocalyptic number.

It is an amenable number.

21011321212233 is a deficient number, since it is larger than the sum of its proper divisors (9865671914103).

21011321212233 is a wasteful number, since it uses less digits than its factorization.

21011321212233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563986744.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21011321212233 its reverse (33221212311012), we get a palindrome (54232533523245).

The spelling of 21011321212233 in words is "twenty-one trillion, eleven billion, three hundred twenty-one million, two hundred twelve thousand, two hundred thirty-three".