1245443100123 has 16 divisors (see below), whose sum is σ = 1665397771776. Its totient is φ = 827894779200.

The previous prime is 1245443100067. The next prime is 1245443100137. The reversal of 1245443100123 is 3210013445421.

It is not a de Polignac number, because 1245443100123 - 2⁹ = 1245443099611 is a prime.

It is a super-2 number, since 2×1245443100123² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1245443104123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385698 + ... + 2100248.

It is an arithmetic number, because the mean of its divisors is an integer number (104087360736).

Almost surely, 2^{1245443100123} is an apocalyptic number.

1245443100123 is a deficient number, since it is larger than the sum of its proper divisors (419954671653).

1245443100123 is a wasteful number, since it uses less digits than its factorization.

1245443100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716234.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1245443100123 its reverse (3210013445421), we get a palindrome (4455456545544).

The spelling of 1245443100123 in words is "one trillion, two hundred forty-five billion, four hundred forty-three million, one hundred thousand, one hundred twenty-three".