21103100133011 has 16 divisors (see below), whose sum is σ = 23497547904768. Its totient is φ = 18820851033600.

The previous prime is 21103100132987. The next prime is 21103100133023. The reversal of 21103100133011 is 11033100130112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103100133011 is a prime.

It is a super-2 number, since 2×21103100133011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103100133041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42186530 + ... + 42683831.

It is an arithmetic number, because the mean of its divisors is an integer number (1468596744048).

Almost surely, 2^{21103100133011} is an apocalyptic number.

21103100133011 is a deficient number, since it is larger than the sum of its proper divisors (2394447771757).

21103100133011 is a wasteful number, since it uses less digits than its factorization.

21103100133011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84871022.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21103100133011 its reverse (11033100130112), we get a palindrome (32136200263123).

The spelling of 21103100133011 in words is "twenty-one trillion, one hundred three billion, one hundred million, one hundred thirty-three thousand, eleven".