1213331313021 has 8 divisors (see below), whose sum is σ = 1618774333920. Its totient is φ = 808387917072.

The previous prime is 1213331312929. The next prime is 1213331313037. The reversal of 1213331313021 is 1203131333121.

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

It is not a de Polignac number, because 1213331313021 - 2¹⁴ = 1213331296637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213331312982 and 1213331313000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213331313121) 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, 124900570 + ... + 124910283.

It is an arithmetic number, because the mean of its divisors is an integer number (202346791740).

Almost surely, 2^{1213331313021} is an apocalyptic number.

It is an amenable number.

1213331313021 is a deficient number, since it is larger than the sum of its proper divisors (405443020899).

1213331313021 is a wasteful number, since it uses less digits than its factorization.

1213331313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249812475.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1213331313021 its reverse (1203131333121), we get a palindrome (2416462646142).

The spelling of 1213331313021 in words is "one trillion, two hundred thirteen billion, three hundred thirty-one million, three hundred thirteen thousand, twenty-one".