13010001221 has 24 divisors (see below), whose sum is σ = 15969648960. Its totient is φ = 10546654272.

The previous prime is 13010001217. The next prime is 13010001227. The reversal of 13010001221 is 12210001031.

It is not a de Polignac number, because 13010001221 - 2² = 13010001217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13010001227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35450 + ... + 165156.

It is an arithmetic number, because the mean of its divisors is an integer number (665402040).

Almost surely, 2^13010001221 is an apocalyptic number.

It is an amenable number.

13010001221 is a deficient number, since it is larger than the sum of its proper divisors (2959647739).

13010001221 is a wasteful number, since it uses less digits than its factorization.

13010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129833 (or 129826 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 13010001221 its reverse (12210001031), we get a palindrome (25220002252).

The spelling of 13010001221 in words is "thirteen billion, ten million, one thousand, two hundred twenty-one".