21103101001031 has 8 divisors (see below), whose sum is σ = 24118267493760. Its totient is φ = 18088043952888.

The previous prime is 21103101001009. The next prime is 21103101001057. The reversal of 21103101001031 is 13010010130112.

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 21103101001031 - 2⁶ = 21103101000967 is a prime.

It is a super-2 number, since 2×21103101001031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103101000997 and 21103101001015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103101001001) 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, 26947541 + ... + 27719598.

It is an arithmetic number, because the mean of its divisors is an integer number (3014783436720).

Almost surely, 2^{21103101001031} is an apocalyptic number.

21103101001031 is a deficient number, since it is larger than the sum of its proper divisors (3015166492729).

21103101001031 is an equidigital number, since it uses as much as digits as its factorization.

21103101001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54722293.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21103101001031 its reverse (13010010130112), we get a palindrome (34113111131143).

The spelling of 21103101001031 in words is "twenty-one trillion, one hundred three billion, one hundred one million, one thousand, thirty-one".