140123121545513 has 8 divisors (see below), whose sum is σ = 141700053731400. Its totient is φ = 138546245250688.

The previous prime is 140123121545503. The next prime is 140123121545531. The reversal of 140123121545513 is 315545121321041.

It can be written as a sum of positive squares in 4 ways, for example, as 21719300197609 + 118403821347904 = 4660397^2 + 10881352^2 .

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 140123121545513 - 2²⁸ = 140122853110057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140123121545503) 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, 8920178 + ... + 18968811.

It is an arithmetic number, because the mean of its divisors is an integer number (17712506716425).

Almost surely, 2^{140123121545513} is an apocalyptic number.

It is an amenable number.

140123121545513 is a deficient number, since it is larger than the sum of its proper divisors (1576932185887).

140123121545513 is an equidigital number, since it uses as much as digits as its factorization.

140123121545513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27945531.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 140123121545513 its reverse (315545121321041), we get a palindrome (455668242866554).

The spelling of 140123121545513 in words is "one hundred forty trillion, one hundred twenty-three billion, one hundred twenty-one million, five hundred forty-five thousand, five hundred thirteen".