1245501321133 has 4 divisors (see below), whose sum is σ = 1245624514048. Its totient is φ = 1245378128220.

The previous prime is 1245501321107. The next prime is 1245501321139. The reversal of 1245501321133 is 3311231055421.

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 1245501321133 - 2²¹ = 1245499223981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245501321095 and 1245501321104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245501321139) 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, 61581291 + ... + 61601512.

It is an arithmetic number, because the mean of its divisors is an integer number (311406128512).

Almost surely, 2^{1245501321133} is an apocalyptic number.

It is an amenable number.

1245501321133 is a deficient number, since it is larger than the sum of its proper divisors (123192915).

1245501321133 is a wasteful number, since it uses less digits than its factorization.

1245501321133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123192914.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 1245501321133 its reverse (3311231055421), we get a palindrome (4556732376554).

The spelling of 1245501321133 in words is "one trillion, two hundred forty-five billion, five hundred one million, three hundred twenty-one thousand, one hundred thirty-three".