1221001230213 has 48 divisors (see below), whose sum is σ = 1913663681280. Its totient is φ = 748420138368.

The previous prime is 1221001230199. The next prime is 1221001230223. The reversal of 1221001230213 is 3120321001221.

1221001230213 is a `hidden beast` number, since 1 + 221 + 0 + 0 + 1 + 230 + 213 = 666.

It is not a de Polignac number, because 1221001230213 - 2³³ = 1212411295621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221001230223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 891195 + ... + 1798952.

It is an arithmetic number, because the mean of its divisors is an integer number (39867993360).

Almost surely, 2^{1221001230213} is an apocalyptic number.

It is an amenable number.

1221001230213 is a deficient number, since it is larger than the sum of its proper divisors (692662451067).

1221001230213 is a wasteful number, since it uses less digits than its factorization.

1221001230213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690266 (or 2690263 counting only the distinct ones).

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

Adding to 1221001230213 its reverse (3120321001221), we get a palindrome (4341322231434).

The spelling of 1221001230213 in words is "one trillion, two hundred twenty-one billion, one million, two hundred thirty thousand, two hundred thirteen".