1210031323013 has 4 divisors (see below), whose sum is σ = 1210051437900. Its totient is φ = 1210011208128.

The previous prime is 1210031323009. The next prime is 1210031323021. The reversal of 1210031323013 is 3103231300121.

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 33203399524 + 1176827923489 = 182218^2 + 1084817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210031323013 - 2² = 1210031323009 is a prime.

It is a super-2 number, since 2×1210031323013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210031320013) 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, 9966938 + ... + 10087611.

It is an arithmetic number, because the mean of its divisors is an integer number (302512859475).

Almost surely, 2^{1210031323013} is an apocalyptic number.

It is an amenable number.

1210031323013 is a deficient number, since it is larger than the sum of its proper divisors (20114887).

1210031323013 is an equidigital number, since it uses as much as digits as its factorization.

1210031323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20114886.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1210031323013 its reverse (3103231300121), we get a palindrome (4313262623134).

The spelling of 1210031323013 in words is "one trillion, two hundred ten billion, thirty-one million, three hundred twenty-three thousand, thirteen".