1228951123450 has 12 divisors (see below), whose sum is σ = 2285849089710. Its totient is φ = 491580449360.

The previous prime is 1228951123447. The next prime is 1228951123507. The reversal of 1228951123450 is 543211598221.

It can be written as a sum of positive squares in 3 ways, for example, as 986766076321 + 242185047129 = 993361^2 + 492123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1228951123397 and 1228951123406.

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 5 ways as a sum of consecutive naturals, for example, 12289511185 + ... + 12289511284.

Almost surely, 2^{1228951123450} is an apocalyptic number.

1228951123450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228951123450 is a deficient number, since it is larger than the sum of its proper divisors (1056897966260).

1228951123450 is a wasteful number, since it uses less digits than its factorization.

1228951123450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24579022481 (or 24579022476 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 1228951123450 in words is "one trillion, two hundred twenty-eight billion, nine hundred fifty-one million, one hundred twenty-three thousand, four hundred fifty".