1213141223231 has 16 divisors (see below), whose sum is σ = 1394219764224. Its totient is φ = 1034020780704.

The previous prime is 1213141223227. The next prime is 1213141223251. The reversal of 1213141223231 is 1323221413121.

It is a cyclic number.

It is not a de Polignac number, because 1213141223231 - 2² = 1213141223227 is a prime.

It is a super-2 number, since 2×1213141223231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213141223231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213141223251) 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, 353396 + ... + 1597238.

It is an arithmetic number, because the mean of its divisors is an integer number (87138735264).

Almost surely, 2^{1213141223231} is an apocalyptic number.

1213141223231 is a deficient number, since it is larger than the sum of its proper divisors (181078540993).

1213141223231 is a wasteful number, since it uses less digits than its factorization.

1213141223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244630.

The product of its digits is 1728, while the sum is 26.

Adding to 1213141223231 its reverse (1323221413121), we get a palindrome (2536362636352).

The spelling of 1213141223231 in words is "one trillion, two hundred thirteen billion, one hundred forty-one million, two hundred twenty-three thousand, two hundred thirty-one".