123045551421 has 64 divisors (see below), whose sum is σ = 194010163200. Its totient is φ = 68636123136.

The previous prime is 123045551417. The next prime is 123045551471. The reversal of 123045551421 is 124155540321.

It is not a de Polignac number, because 123045551421 - 2² = 123045551417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123045551471) 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 63 ways as a sum of consecutive naturals, for example, 7856020 + ... + 7871666.

It is an arithmetic number, because the mean of its divisors is an integer number (3031408800).

Almost surely, 2^123045551421 is an apocalyptic number.

It is an amenable number.

123045551421 is a deficient number, since it is larger than the sum of its proper divisors (70964611779).

123045551421 is a wasteful number, since it uses less digits than its factorization.

123045551421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16118.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 123045551421 in words is "one hundred twenty-three billion, forty-five million, five hundred fifty-one thousand, four hundred twenty-one".