1213130123231 has 16 divisors (see below), whose sum is σ = 1338807298080. Its totient is φ = 1092095930880.

The previous prime is 1213130123197. The next prime is 1213130123263. The reversal of 1213130123231 is 1323210313121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213130123231 is a prime.

It is a super-2 number, since 2×1213130123231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213130123197 and 1213130123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213130123431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026560 + ... + 1865498.

It is an arithmetic number, because the mean of its divisors is an integer number (83675456130).

Almost surely, 2^{1213130123231} is an apocalyptic number.

1213130123231 is a deficient number, since it is larger than the sum of its proper divisors (125677174849).

1213130123231 is a wasteful number, since it uses less digits than its factorization.

1213130123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841706.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1213130123231 its reverse (1323210313121), we get a palindrome (2536340436352).

The spelling of 1213130123231 in words is "one trillion, two hundred thirteen billion, one hundred thirty million, one hundred twenty-three thousand, two hundred thirty-one".