1123378016421 has 12 divisors (see below), whose sum is σ = 1580820035712. Its totient is φ = 709501904424.

The previous prime is 1123378016359. The next prime is 1123378016429. The reversal of 1123378016421 is 1246108733211.

It is not a de Polignac number, because 1123378016421 - 2⁹ = 1123378015909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123378016421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123378016429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518640661 + ... + 518642826.

It is an arithmetic number, because the mean of its divisors is an integer number (131735002976).

Almost surely, 2^{1123378016421} is an apocalyptic number.

It is an amenable number.

1123378016421 is a deficient number, since it is larger than the sum of its proper divisors (457442019291).

1123378016421 is a wasteful number, since it uses less digits than its factorization.

1123378016421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037283528 (or 1037283509 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 1123378016421 in words is "one trillion, one hundred twenty-three billion, three hundred seventy-eight million, sixteen thousand, four hundred twenty-one".