1213231131029 has 8 divisors (see below), whose sum is σ = 1231229027160. Its totient is φ = 1195330259200.

The previous prime is 1213231131011. The next prime is 1213231131041. The reversal of 1213231131029 is 9201311323121.

It can be written as a sum of positive squares in 4 ways, for example, as 465092628529 + 748138502500 = 681977^2 + 864950^2 .

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 1213231131029 - 2²⁰ = 1213230082453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213231130992 and 1213231131010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213231131089) 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, 24230882 + ... + 24280899.

It is an arithmetic number, because the mean of its divisors is an integer number (153903628395).

Almost surely, 2^{1213231131029} is an apocalyptic number.

It is an amenable number.

1213231131029 is a deficient number, since it is larger than the sum of its proper divisors (17997896131).

1213231131029 is an equidigital number, since it uses as much as digits as its factorization.

1213231131029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48512151.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 1213231131029 in words is "one trillion, two hundred thirteen billion, two hundred thirty-one million, one hundred thirty-one thousand, twenty-nine".