1231400203430 has 16 divisors (see below), whose sum is σ = 2220101185680. Its totient is φ = 491764343712.

The previous prime is 1231400203393. The next prime is 1231400203469. The reversal of 1231400203430 is 343020041321.

It is a super-2 number, since 2×1231400203430² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231400203396 and 1231400203405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99460709 + ... + 99473088.

It is an arithmetic number, because the mean of its divisors is an integer number (138756324105).

Almost surely, 2^{1231400203430} is an apocalyptic number.

1231400203430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231400203430 is a deficient number, since it is larger than the sum of its proper divisors (988700982250).

1231400203430 is a wasteful number, since it uses less digits than its factorization.

1231400203430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198934423.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1231400203430 its reverse (343020041321), we get a palindrome (1574420244751).

The spelling of 1231400203430 in words is "one trillion, two hundred thirty-one billion, four hundred million, two hundred three thousand, four hundred thirty".