11231212413 has 4 divisors (see below), whose sum is σ = 14974949888. Its totient is φ = 7487474940.

The previous prime is 11231212403. The next prime is 11231212427. The reversal of 11231212413 is 31421213211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31421213211 = 3 ⋅10473737737.

It is not a de Polignac number, because 11231212413 - 2²⁶ = 11164103549 is a prime.

It is a super-2 number, since 2×11231212413² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11231212413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231212403) 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, 1871868733 + ... + 1871868738.

It is an arithmetic number, because the mean of its divisors is an integer number (3743737472).

Almost surely, 2^11231212413 is an apocalyptic number.

It is an amenable number.

11231212413 is a deficient number, since it is larger than the sum of its proper divisors (3743737475).

11231212413 is an equidigital number, since it uses as much as digits as its factorization.

11231212413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743737474.

The product of its digits is 288, while the sum is 21.

Adding to 11231212413 its reverse (31421213211), we get a palindrome (42652425624).

The spelling of 11231212413 in words is "eleven billion, two hundred thirty-one million, two hundred twelve thousand, four hundred thirteen".