1221022210013 has 4 divisors (see below), whose sum is σ = 1221150222720. Its totient is φ = 1220894197308.

The previous prime is 1221022210003. The next prime is 1221022210019. The reversal of 1221022210013 is 3100122201221.

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 1221022210013 - 2²² = 1221018015709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221022209973 and 1221022210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221022210019) 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, 63992045 + ... + 64011122.

It is an arithmetic number, because the mean of its divisors is an integer number (305287555680).

Almost surely, 2^{1221022210013} is an apocalyptic number.

It is an amenable number.

1221022210013 is a deficient number, since it is larger than the sum of its proper divisors (128012707).

1221022210013 is an equidigital number, since it uses as much as digits as its factorization.

1221022210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128012706.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221022210013 its reverse (3100122201221), we get a palindrome (4321144411234).

The spelling of 1221022210013 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred ten thousand, thirteen".