21103011331033 has 8 divisors (see below), whose sum is σ = 21181809514376. Its totient is φ = 21024285609600.

The previous prime is 21103011331001. The next prime is 21103011331063. The reversal of 21103011331033 is 33013311030112.

It can be written as a sum of positive squares in 4 ways, for example, as 190801228864 + 20912210102169 = 436808^2 + 4572987^2 .

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 21103011331033 - 2⁵ = 21103011331001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103011330995 and 21103011331013.

It is not an unprimeable number, because it can be changed into a prime (21103011331063) 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, 17531898 + ... + 18696883.

It is an arithmetic number, because the mean of its divisors is an integer number (2647726189297).

Almost surely, 2^{21103011331033} is an apocalyptic number.

It is an amenable number.

21103011331033 is a deficient number, since it is larger than the sum of its proper divisors (78798183343).

21103011331033 is a wasteful number, since it uses less digits than its factorization.

21103011331033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36230955.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 21103011331033 its reverse (33013311030112), we get a palindrome (54116322361145).

The spelling of 21103011331033 in words is "twenty-one trillion, one hundred three billion, eleven million, three hundred thirty-one thousand, thirty-three".