21103121230011 has 8 divisors (see below), whose sum is σ = 31263883303760. Its totient is φ = 14068747486656.

The previous prime is 21103121229907. The next prime is 21103121230031. The reversal of 21103121230011 is 11003212130112.

21103121230011 is a `hidden beast` number, since 2 + 110 + 31 + 212 + 300 + 11 = 666.

It is not a de Polignac number, because 21103121230011 - 2¹⁴ = 21103121213627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103121230031) 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, 390798541270 + ... + 390798541323.

It is an arithmetic number, because the mean of its divisors is an integer number (3907985412970).

Almost surely, 2^{21103121230011} is an apocalyptic number.

21103121230011 is a deficient number, since it is larger than the sum of its proper divisors (10160762073749).

21103121230011 is an equidigital number, since it uses as much as digits as its factorization.

21103121230011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781597082602 (or 781597082596 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21103121230011 its reverse (11003212130112), we get a palindrome (32106333360123).

The spelling of 21103121230011 in words is "twenty-one trillion, one hundred three billion, one hundred twenty-one million, two hundred thirty thousand, eleven".