1000123440051 has 4 divisors (see below), whose sum is σ = 1333497920072. Its totient is φ = 666748960032.

The previous prime is 1000123440037. The next prime is 1000123440103. The reversal of 1000123440051 is 1500443210001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1000123440051 - 2⁷ = 1000123439923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000123440551) 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 3 ways as a sum of consecutive naturals, for example, 166687240006 + ... + 166687240011.

It is an arithmetic number, because the mean of its divisors is an integer number (333374480018).

Almost surely, 2^{1000123440051} is an apocalyptic number.

1000123440051 is a deficient number, since it is larger than the sum of its proper divisors (333374480021).

1000123440051 is an equidigital number, since it uses as much as digits as its factorization.

1000123440051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333374480020.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1000123440051 its reverse (1500443210001), we get a palindrome (2500566650052).

The spelling of 1000123440051 in words is "one trillion, one hundred twenty-three million, four hundred forty thousand, fifty-one".