21000011021331 has 8 divisors (see below), whose sum is σ = 28178358738384. Its totient is φ = 13910835325920.

The previous prime is 21000011021309. The next prime is 21000011021369. The reversal of 21000011021331 is 13312011000012.

It is a happy number.

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

It is not a de Polignac number, because 21000011021331 - 2⁷ = 21000011021203 is a prime.

It is a super-2 number, since 2×21000011021331² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21000011021331.

It is not an unprimeable number, because it can be changed into a prime (21000011023331) 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, 22293004860 + ... + 22293005801.

It is an arithmetic number, because the mean of its divisors is an integer number (3522294842298).

Almost surely, 2^{21000011021331} is an apocalyptic number.

21000011021331 is a deficient number, since it is larger than the sum of its proper divisors (7178347717053).

21000011021331 is a wasteful number, since it uses less digits than its factorization.

21000011021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44586010821.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21000011021331 its reverse (13312011000012), we get a palindrome (34312022021343).

The spelling of 21000011021331 in words is "twenty-one trillion, eleven million, twenty-one thousand, three hundred thirty-one".