21100102021331 has 8 divisors (see below), whose sum is σ = 23061971090304. Its totient is φ = 19218309240960.

The previous prime is 21100102021253. The next prime is 21100102021363. The reversal of 21100102021331 is 13312020100112.

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

It is not a de Polignac number, because 21100102021331 - 2¹⁰ = 21100102020307 is a prime.

It is a super-2 number, since 2×21100102021331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100102021231) 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 7 ways as a sum of consecutive naturals, for example, 20019071600 + ... + 20019072653.

It is an arithmetic number, because the mean of its divisors is an integer number (2882746386288).

Almost surely, 2^{21100102021331} is an apocalyptic number.

21100102021331 is a deficient number, since it is larger than the sum of its proper divisors (1961869068973).

21100102021331 is a wasteful number, since it uses less digits than its factorization.

21100102021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40038144301.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21100102021331 its reverse (13312020100112), we get a palindrome (34412122121443).

The spelling of 21100102021331 in words is "twenty-one trillion, one hundred billion, one hundred two million, twenty-one thousand, three hundred thirty-one".