21020333011233 has 16 divisors (see below), whose sum is σ = 28229754067200. Its totient is φ = 13912240859280.

The previous prime is 21020333011229. The next prime is 21020333011259. The reversal of 21020333011233 is 33211033302012.

It is not a de Polignac number, because 21020333011233 - 2² = 21020333011229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020333011033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10960258 + ... + 12734516.

It is an arithmetic number, because the mean of its divisors is an integer number (1764359629200).

Almost surely, 2^{21020333011233} is an apocalyptic number.

It is an amenable number.

21020333011233 is a deficient number, since it is larger than the sum of its proper divisors (7209421055967).

21020333011233 is a wasteful number, since it uses less digits than its factorization.

21020333011233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802812.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21020333011233 its reverse (33211033302012), we get a palindrome (54231366313245).

The spelling of 21020333011233 in words is "twenty-one trillion, twenty billion, three hundred thirty-three million, eleven thousand, two hundred thirty-three".