21111101333 has 16 divisors (see below), whose sum is σ = 25180375296. Its totient is φ = 17305453440.

The previous prime is 21111101329. The next prime is 21111101357. The reversal of 21111101333 is 33310111112.

It is a cyclic number.

It is not a de Polignac number, because 21111101333 - 2² = 21111101329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111101393) 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, 1742585 + ... + 1754657.

It is an arithmetic number, because the mean of its divisors is an integer number (1573773456).

Almost surely, 2^21111101333 is an apocalyptic number.

21111101333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21111101333 is a deficient number, since it is larger than the sum of its proper divisors (4069273963).

21111101333 is a wasteful number, since it uses less digits than its factorization.

21111101333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22964.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21111101333 its reverse (33310111112), we get a palindrome (54421212445).

The spelling of 21111101333 in words is "twenty-one billion, one hundred eleven million, one hundred one thousand, three hundred thirty-three".