1213100131223 has 8 divisors (see below), whose sum is σ = 1218282635856. Its totient is φ = 1207918857600.

The previous prime is 1213100131141. The next prime is 1213100131249. The reversal of 1213100131223 is 3221310013121.

It is a happy number.

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 1213100131223 - 2²⁸ = 1212831695767 is a prime.

It is a super-2 number, since 2×1213100131223² (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 = 1213100131195 and 1213100131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213100131723) 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, 1695128 + ... + 2302098.

It is an arithmetic number, because the mean of its divisors is an integer number (152285329482).

Almost surely, 2^{1213100131223} is an apocalyptic number.

1213100131223 is a deficient number, since it is larger than the sum of its proper divisors (5182504633).

1213100131223 is an equidigital number, since it uses as much as digits as its factorization.

1213100131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615505.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213100131223 its reverse (3221310013121), we get a palindrome (4434410144344).

The spelling of 1213100131223 in words is "one trillion, two hundred thirteen billion, one hundred million, one hundred thirty-one thousand, two hundred twenty-three".