1213121023321 has 8 divisors (see below), whose sum is σ = 1217802708864. Its totient is φ = 1208444471520.

The previous prime is 1213121023313. The next prime is 1213121023369. The reversal of 1213121023321 is 1233201213121.

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 1213121023321 - 2³ = 1213121023313 is a prime.

It is a super-3 number, since 3×1213121023321³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213121023292 and 1213121023301.

It is not an unprimeable number, because it can be changed into a prime (1213121023721) 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, 809581 + ... + 1755466.

It is an arithmetic number, because the mean of its divisors is an integer number (152225338608).

Almost surely, 2^{1213121023321} is an apocalyptic number.

It is an amenable number.

1213121023321 is a deficient number, since it is larger than the sum of its proper divisors (4681685543).

1213121023321 is a wasteful number, since it uses less digits than its factorization.

1213121023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566871.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1213121023321 its reverse (1233201213121), we get a palindrome (2446322236442).

The spelling of 1213121023321 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, twenty-three thousand, three hundred twenty-one".