2145315212123 has 8 divisors (see below), whose sum is σ = 2176341970176. Its totient is φ = 2114310983400.

The previous prime is 2145315212101. The next prime is 2145315212137. The reversal of 2145315212123 is 3212125135412.

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 2145315212123 - 2⁶ = 2145315212059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145315212123.

It is not an unprimeable number, because it can be changed into a prime (2145315215123) 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, 5440463 + ... + 5821448.

It is an arithmetic number, because the mean of its divisors is an integer number (272042746272).

Almost surely, 2^{2145315212123} is an apocalyptic number.

2145315212123 is a deficient number, since it is larger than the sum of its proper divisors (31026758053).

2145315212123 is a wasteful number, since it uses less digits than its factorization.

2145315212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11264665.

The product of its digits is 14400, while the sum is 32.

The spelling of 2145315212123 in words is "two trillion, one hundred forty-five billion, three hundred fifteen million, two hundred twelve thousand, one hundred twenty-three".