1213244061523 has 4 divisors (see below), whose sum is σ = 1306570527808. Its totient is φ = 1119917595240.

The previous prime is 1213244061481. The next prime is 1213244061553. The reversal of 1213244061523 is 3251604423121.

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 1213244061523 - 2³³ = 1204654126931 is a prime.

It is a super-2 number, since 2×1213244061523² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213244061553) 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, 46663233123 + ... + 46663233148.

It is an arithmetic number, because the mean of its divisors is an integer number (326642631952).

Almost surely, 2^{1213244061523} is an apocalyptic number.

1213244061523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213244061523 is a deficient number, since it is larger than the sum of its proper divisors (93326466285).

1213244061523 is an equidigital number, since it uses as much as digits as its factorization.

1213244061523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93326466284.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 1213244061523 its reverse (3251604423121), we get a palindrome (4464848484644).

The spelling of 1213244061523 in words is "one trillion, two hundred thirteen billion, two hundred forty-four million, sixty-one thousand, five hundred twenty-three".