3121220432243 has 16 divisors (see below), whose sum is σ = 3235033332960. Its totient is φ = 3007821600000.

The previous prime is 3121220432237. The next prime is 3121220432251. The reversal of 3121220432243 is 3422340221213.

It is a cyclic number.

It is not a de Polignac number, because 3121220432243 - 2⁶ = 3121220432179 is a prime.

It is a super-3 number, since 3×3121220432243³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121220435243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138703493 + ... + 138725993.

It is an arithmetic number, because the mean of its divisors is an integer number (202189583310).

Almost surely, 2^{3121220432243} is an apocalyptic number.

3121220432243 is a deficient number, since it is larger than the sum of its proper divisors (113812900717).

3121220432243 is a wasteful number, since it uses less digits than its factorization.

3121220432243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31478.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 3121220432243 its reverse (3422340221213), we get a palindrome (6543560653456).

The spelling of 3121220432243 in words is "three trillion, one hundred twenty-one billion, two hundred twenty million, four hundred thirty-two thousand, two hundred forty-three".