21333211000123 has 4 divisors (see below), whose sum is σ = 23272593818328. Its totient is φ = 19393828181920.

The previous prime is 21333211000103. The next prime is 21333211000181. The reversal of 21333211000123 is 32100011233312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21333211000123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21333211000094 and 21333211000103.

It is not an unprimeable number, because it can be changed into a prime (21333211000103) 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, 969691409086 + ... + 969691409107.

It is an arithmetic number, because the mean of its divisors is an integer number (5818148454582).

Almost surely, 2^{21333211000123} is an apocalyptic number.

21333211000123 is a deficient number, since it is larger than the sum of its proper divisors (1939382818205).

21333211000123 is a wasteful number, since it uses less digits than its factorization.

21333211000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939382818204.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21333211000123 its reverse (32100011233312), we get a palindrome (53433222233435).

The spelling of 21333211000123 in words is "twenty-one trillion, three hundred thirty-three billion, two hundred eleven million, one hundred twenty-three", and thus it is an aban number.