1125210021413 has 4 divisors (see below), whose sum is σ = 1191398846220. Its totient is φ = 1059021196608.

The previous prime is 1125210021373. The next prime is 1125210021421. The reversal of 1125210021413 is 3141200125211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 677358628324 + 447851393089 = 823018^2 + 669217^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125210021413 - 2¹² = 1125210017317 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 (1125210021473) 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, 33094412378 + ... + 33094412411.

It is an arithmetic number, because the mean of its divisors is an integer number (297849711555).

Almost surely, 2^{1125210021413} is an apocalyptic number.

It is an amenable number.

1125210021413 is a deficient number, since it is larger than the sum of its proper divisors (66188824807).

1125210021413 is an equidigital number, since it uses as much as digits as its factorization.

1125210021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66188824806.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1125210021413 its reverse (3141200125211), we get a palindrome (4266410146624).

The spelling of 1125210021413 in words is "one trillion, one hundred twenty-five billion, two hundred ten million, twenty-one thousand, four hundred thirteen".