13212020000021 has 4 divisors (see below), whose sum is σ = 13212029105472. Its totient is φ = 13212010894572.

The previous prime is 13212020000009. The next prime is 13212020000027. The reversal of 13212020000021 is 12000002021231.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13212020000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13212019999960 and 13212020000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212020000027) 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, 1835741 + ... + 5458386.

It is an arithmetic number, because the mean of its divisors is an integer number (3303007276368).

Almost surely, 2^{13212020000021} is an apocalyptic number.

It is an amenable number.

13212020000021 is a deficient number, since it is larger than the sum of its proper divisors (9105451).

13212020000021 is an equidigital number, since it uses as much as digits as its factorization.

13212020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105450.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 13212020000021 its reverse (12000002021231), we get a palindrome (25212022021252).

The spelling of 13212020000021 in words is "thirteen trillion, two hundred twelve billion, twenty million, twenty-one", and thus it is an aban number.