20101103130021 has 4 divisors (see below), whose sum is σ = 26801470840032. Its totient is φ = 13400735420012.

The previous prime is 20101103130013. The next prime is 20101103130037. The reversal of 20101103130021 is 12003130110102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20101103130021 - 2³ = 20101103130013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101103140021) 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 3 ways as a sum of consecutive naturals, for example, 3350183855001 + ... + 3350183855006.

It is an arithmetic number, because the mean of its divisors is an integer number (6700367710008).

Almost surely, 2^{20101103130021} is an apocalyptic number.

It is an amenable number.

20101103130021 is a deficient number, since it is larger than the sum of its proper divisors (6700367710011).

20101103130021 is an equidigital number, since it uses as much as digits as its factorization.

20101103130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700367710010.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20101103130021 its reverse (12003130110102), we get a palindrome (32104233240123).

The spelling of 20101103130021 in words is "twenty trillion, one hundred one billion, one hundred three million, one hundred thirty thousand, twenty-one".