1245544221231 has 40 divisors (see below), whose sum is σ = 1874616407664. Its totient is φ = 824132050560.

The previous prime is 1245544221221. The next prime is 1245544221269. The reversal of 1245544221231 is 1321224455421.

1245544221231 is a `hidden beast` number, since 1 + 24 + 554 + 42 + 2 + 12 + 31 = 666.

It is not a de Polignac number, because 1245544221231 - 2³⁰ = 1244470479407 is a prime.

It is a super-2 number, since 2×1245544221231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245544221221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11173651 + ... + 11284571.

Almost surely, 2^{1245544221231} is an apocalyptic number.

1245544221231 is a deficient number, since it is larger than the sum of its proper divisors (629072186433).

1245544221231 is a wasteful number, since it uses less digits than its factorization.

1245544221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111973 (or 111964 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 1245544221231 its reverse (1321224455421), we get a palindrome (2566768676652).

The spelling of 1245544221231 in words is "one trillion, two hundred forty-five billion, five hundred forty-four million, two hundred twenty-one thousand, two hundred thirty-one".