2123278535501 has 8 divisors (see below), whose sum is σ = 2126151078144. Its totient is φ = 2120406210720.

The previous prime is 2123278535471. The next prime is 2123278535519. The reversal of 2123278535501 is 1055358723212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123278535501 - 2¹⁰ = 2123278534477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123278555501) by changing a digit.

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, 32281490 + ... + 32347196.

It is an arithmetic number, because the mean of its divisors is an integer number (265768884768).

Almost surely, 2^{2123278535501} is an apocalyptic number.

It is an amenable number.

2123278535501 is a deficient number, since it is larger than the sum of its proper divisors (2872542643).

2123278535501 is an equidigital number, since it uses as much as digits as its factorization.

2123278535501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108931.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 2123278535501 in words is "two trillion, one hundred twenty-three billion, two hundred seventy-eight million, five hundred thirty-five thousand, five hundred one".