21033011021311 has 8 divisors (see below), whose sum is σ = 23102620801920. Its totient is φ = 19059662160792.

The previous prime is 21033011021249. The next prime is 21033011021317. The reversal of 21033011021311 is 11312011033012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033011021311 - 2⁹ = 21033011020799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033011021317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24065229565 + ... + 24065230438.

It is an arithmetic number, because the mean of its divisors is an integer number (2887827600240).

Almost surely, 2^{21033011021311} is an apocalyptic number.

21033011021311 is a deficient number, since it is larger than the sum of its proper divisors (2069609780609).

21033011021311 is a wasteful number, since it uses less digits than its factorization.

21033011021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48130460045.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21033011021311 its reverse (11312011033012), we get a palindrome (32345022054323).

The spelling of 21033011021311 in words is "twenty-one trillion, thirty-three billion, eleven million, twenty-one thousand, three hundred eleven".