1213101201123 has 24 divisors (see below), whose sum is σ = 2003316556800. Its totient is φ = 692945641584.

The previous prime is 1213101201119. The next prime is 1213101201127. The reversal of 1213101201123 is 3211021013121.

1213101201123 is a `hidden beast` number, since 121 + 310 + 120 + 112 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1213101201119) and next prime (1213101201127).

It is not a de Polignac number, because 1213101201123 - 2² = 1213101201119 is a prime.

It is a super-2 number, since 2×1213101201123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213101201096 and 1213101201105.

It is not an unprimeable number, because it can be changed into a prime (1213101201127) 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 23 ways as a sum of consecutive naturals, for example, 3369633 + ... + 3712226.

It is an arithmetic number, because the mean of its divisors is an integer number (83471523200).

Almost surely, 2^{1213101201123} is an apocalyptic number.

1213101201123 is a deficient number, since it is larger than the sum of its proper divisors (790215355677).

1213101201123 is a wasteful number, since it uses less digits than its factorization.

1213101201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084591 (or 7084588 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1213101201123 its reverse (3211021013121), we get a palindrome (4424122214244).

The spelling of 1213101201123 in words is "one trillion, two hundred thirteen billion, one hundred one million, two hundred one thousand, one hundred twenty-three".