31230121220343 has 20 divisors (see below), whose sum is σ = 46760145627888. Its totient is φ = 20771997462720.

The previous prime is 31230121220339. The next prime is 31230121220401. The reversal of 31230121220343 is 34302212103213.

31230121220343 is a `hidden beast` number, since 3 + 1 + 2 + 301 + 2 + 12 + 2 + 0 + 343 = 666.

It is not a de Polignac number, because 31230121220343 - 2² = 31230121220339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230121222343) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 445180923 + ... + 445251068.

Almost surely, 2^{31230121220343} is an apocalyptic number.

31230121220343 is a deficient number, since it is larger than the sum of its proper divisors (15530024407545).

31230121220343 is an equidigital number, since it uses as much as digits as its factorization.

31230121220343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890432436 (or 890432427 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31230121220343 its reverse (34302212103213), we get a palindrome (65532333323556).

The spelling of 31230121220343 in words is "thirty-one trillion, two hundred thirty billion, one hundred twenty-one million, two hundred twenty thousand, three hundred forty-three".