1213101331223 has 4 divisors (see below), whose sum is σ = 1254932411640. Its totient is φ = 1171270250808.

The previous prime is 1213101331201. The next prime is 1213101331237. The reversal of 1213101331223 is 3221331013121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213101331223 - 2⁶ = 1213101331159 is a prime.

It is a super-2 number, since 2×1213101331223² (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 (1213101331523) 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, 20915540165 + ... + 20915540222.

It is an arithmetic number, because the mean of its divisors is an integer number (313733102910).

Almost surely, 2^{1213101331223} is an apocalyptic number.

1213101331223 is a deficient number, since it is larger than the sum of its proper divisors (41831080417).

1213101331223 is an equidigital number, since it uses as much as digits as its factorization.

1213101331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41831080416.

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

Adding to 1213101331223 its reverse (3221331013121), we get a palindrome (4434432344344).

The spelling of 1213101331223 in words is "one trillion, two hundred thirteen billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-three".