1213120223231 has 8 divisors (see below), whose sum is σ = 1386460047360. Its totient is φ = 1039789632888.

The previous prime is 1213120223111. The next prime is 1213120223233. The reversal of 1213120223231 is 1323220213121.

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 1213120223231 - 2¹⁴ = 1213120206847 is a prime.

It is a super-2 number, since 2×1213120223231² (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 = 1213120223197 and 1213120223206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213120223233) 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, 2024591 + ... + 2554448.

It is an arithmetic number, because the mean of its divisors is an integer number (173307505920).

Almost surely, 2^{1213120223231} is an apocalyptic number.

1213120223231 is a deficient number, since it is larger than the sum of its proper divisors (173339824129).

1213120223231 is an equidigital number, since it uses as much as digits as its factorization.

1213120223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616893.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1213120223231 its reverse (1323220213121), we get a palindrome (2536340436352).

The spelling of 1213120223231 in words is "one trillion, two hundred thirteen billion, one hundred twenty million, two hundred twenty-three thousand, two hundred thirty-one".