2156123501313 has 8 divisors (see below), whose sum is σ = 2893142363328. Its totient is φ = 1428260153424.

The previous prime is 2156123501293. The next prime is 2156123501423. The reversal of 2156123501313 is 3131053216512.

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

It is not a de Polignac number, because 2156123501313 - 2³² = 2151828534017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156128501313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2288877981 + ... + 2288878922.

It is an arithmetic number, because the mean of its divisors is an integer number (361642795416).

Almost surely, 2^{2156123501313} is an apocalyptic number.

It is an amenable number.

2156123501313 is a deficient number, since it is larger than the sum of its proper divisors (737018862015).

2156123501313 is a wasteful number, since it uses less digits than its factorization.

2156123501313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577757063.

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 2156123501313 its reverse (3131053216512), we get a palindrome (5287176717825).

The spelling of 2156123501313 in words is "two trillion, one hundred fifty-six billion, one hundred twenty-three million, five hundred one thousand, three hundred thirteen".