13010110021021 has 4 divisors (see below), whose sum is σ = 13010119130044. Its totient is φ = 13010100912000.

The previous prime is 13010110020983. The next prime is 13010110021033. The reversal of 13010110021021 is 12012001101031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6441499836121 + 6568610184900 = 2538011^2 + 2562930^2 .

It is a cyclic number.

It is not a de Polignac number, because 13010110021021 - 2⁴³ = 4214016998813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13010110020992 and 13010110021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13010110021121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894110 + ... + 5441311.

It is an arithmetic number, because the mean of its divisors is an integer number (3252529782511).

Almost surely, 2^{13010110021021} is an apocalyptic number.

It is an amenable number.

13010110021021 is a deficient number, since it is larger than the sum of its proper divisors (9109023).

13010110021021 is an equidigital number, since it uses as much as digits as its factorization.

13010110021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109022.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 13010110021021 its reverse (12012001101031), we get a palindrome (25022111122052).

The spelling of 13010110021021 in words is "thirteen trillion, ten billion, one hundred ten million, twenty-one thousand, twenty-one".