1000013001221 has 8 divisors (see below), whose sum is σ = 1079243159904. Its totient is φ = 921112282800.

The previous prime is 1000013001157. The next prime is 1000013001223. The reversal of 1000013001221 is 1221003100001.

1000013001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000013001221 - 2⁶ = 1000013001157 is a prime.

It is a super-2 number, since 2×1000013001221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000013001223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82353755 + ... + 82365896.

It is an arithmetic number, because the mean of its divisors is an integer number (134905394988).

Almost surely, 2^{1000013001221} is an apocalyptic number.

It is an amenable number.

1000013001221 is a deficient number, since it is larger than the sum of its proper divisors (79230158683).

1000013001221 is a wasteful number, since it uses less digits than its factorization.

1000013001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164720131.

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

Adding to 1000013001221 its reverse (1221003100001), we get a palindrome (2221016101222).

The spelling of 1000013001221 in words is "one trillion, thirteen million, one thousand, two hundred twenty-one".