13103001210021 has 4 divisors (see below), whose sum is σ = 17470668280032. Its totient is φ = 8735334140012.

The previous prime is 13103001210017. The next prime is 13103001210023. The reversal of 13103001210021 is 12001210030131.

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 13103001210021 - 2² = 13103001210017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13103001210023) 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, 2183833535001 + ... + 2183833535006.

It is an arithmetic number, because the mean of its divisors is an integer number (4367667070008).

Almost surely, 2^{13103001210021} is an apocalyptic number.

It is an amenable number.

13103001210021 is a deficient number, since it is larger than the sum of its proper divisors (4367667070011).

13103001210021 is an equidigital number, since it uses as much as digits as its factorization.

13103001210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367667070010.

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

Adding to 13103001210021 its reverse (12001210030131), we get a palindrome (25104211240152).

The spelling of 13103001210021 in words is "thirteen trillion, one hundred three billion, one million, two hundred ten thousand, twenty-one".