2145440122013 has 4 divisors (see below), whose sum is σ = 2145454155840. Its totient is φ = 2145426088188.

The previous prime is 2145440122009. The next prime is 2145440122051. The reversal of 2145440122013 is 3102210445412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2145440122013 - 2² = 2145440122009 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 (2145440122073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6785045 + ... + 7094202.

It is an arithmetic number, because the mean of its divisors is an integer number (536363538960).

Almost surely, 2^{2145440122013} is an apocalyptic number.

It is an amenable number.

2145440122013 is a deficient number, since it is larger than the sum of its proper divisors (14033827).

2145440122013 is a wasteful number, since it uses less digits than its factorization.

2145440122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14033826.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 2145440122013 its reverse (3102210445412), we get a palindrome (5247650567425).

The spelling of 2145440122013 in words is "two trillion, one hundred forty-five billion, four hundred forty million, one hundred twenty-two thousand, thirteen".