1213311011123 has 8 divisors (see below), whose sum is σ = 1233335291328. Its totient is φ = 1193343059304.

The previous prime is 1213311011117. The next prime is 1213311011177. The reversal of 1213311011123 is 3211101133121.

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 1213311011123 - 2³⁸ = 938433104179 is a prime.

It is a super-2 number, since 2×1213311011123² (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 = 1213311011095 and 1213311011104.

It is not an unprimeable number, because it can be changed into a prime (1213311011183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14038661 + ... + 14124822.

It is an arithmetic number, because the mean of its divisors is an integer number (154166911416).

Almost surely, 2^{1213311011123} is an apocalyptic number.

1213311011123 is a deficient number, since it is larger than the sum of its proper divisors (20024280205).

1213311011123 is an equidigital number, since it uses as much as digits as its factorization.

1213311011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28164193.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1213311011123 its reverse (3211101133121), we get a palindrome (4424412144244).

The spelling of 1213311011123 in words is "one trillion, two hundred thirteen billion, three hundred eleven million, eleven thousand, one hundred twenty-three".