1231023342340 has 48 divisors (see below), whose sum is σ = 2820425106240. Its totient is φ = 447603178880.

The previous prime is 1231023342319. The next prime is 1231023342343. The reversal of 1231023342340 is 432433201321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1231023342299 and 1231023342308.

It is not an unprimeable number, because it can be changed into a prime (1231023342343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2159091 + ... + 2669029.

It is an arithmetic number, because the mean of its divisors is an integer number (58758856380).

Almost surely, 2^{1231023342340} is an apocalyptic number.

1231023342340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231023342340 is an abundant number, since it is smaller than the sum of its proper divisors (1589401763900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231023342340 is a wasteful number, since it uses less digits than its factorization.

1231023342340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520932 (or 520930 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1231023342340 its reverse (432433201321), we get a palindrome (1663456543661).

The spelling of 1231023342340 in words is "one trillion, two hundred thirty-one billion, twenty-three million, three hundred forty-two thousand, three hundred forty".