1001230213221 has 24 divisors (see below), whose sum is σ = 1697495414784. Its totient is φ = 556668534240.

The previous prime is 1001230213199. The next prime is 1001230213231. The reversal of 1001230213221 is 1223120321001.

1001230213221 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 230 + 213 + 221 = 666.

1001230213221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001230213221 - 2²² = 1001226018917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001230213194 and 1001230213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001230213231) 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, 214761765 + ... + 214766426.

It is an arithmetic number, because the mean of its divisors is an integer number (70728975616).

Almost surely, 2^{1001230213221} is an apocalyptic number.

It is an amenable number.

1001230213221 is a deficient number, since it is larger than the sum of its proper divisors (696265201563).

1001230213221 is a wasteful number, since it uses less digits than its factorization.

1001230213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429528241 (or 429528238 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1001230213221 its reverse (1223120321001), we get a palindrome (2224350534222).

The spelling of 1001230213221 in words is "one trillion, one billion, two hundred thirty million, two hundred thirteen thousand, two hundred twenty-one".