1213554041423 has 4 divisors (see below), whose sum is σ = 1214032009320. Its totient is φ = 1213076073528.

The previous prime is 1213554041417. The next prime is 1213554041437. The reversal of 1213554041423 is 3241404553121.

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 1213554041423 - 2²⁴ = 1213537264207 is a prime.

It is a super-2 number, since 2×1213554041423² (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 (1213554841423) 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, 238980140 + ... + 238985217.

It is an arithmetic number, because the mean of its divisors is an integer number (303508002330).

Almost surely, 2^{1213554041423} is an apocalyptic number.

1213554041423 is a deficient number, since it is larger than the sum of its proper divisors (477967897).

1213554041423 is an equidigital number, since it uses as much as digits as its factorization.

1213554041423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477967896.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 1213554041423 its reverse (3241404553121), we get a palindrome (4454958594544).

The spelling of 1213554041423 in words is "one trillion, two hundred thirteen billion, five hundred fifty-four million, forty-one thousand, four hundred twenty-three".