11111121213 has 8 divisors (see below), whose sum is σ = 14815612800. Its totient is φ = 7407021888.

The previous prime is 11111121211. The next prime is 11111121247. The reversal of 11111121213 is 31212111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111121213 - 2¹ = 11111121211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111121192 and 11111121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23973 + ... + 150986.

It is an arithmetic number, because the mean of its divisors is an integer number (1851951600).

Almost surely, 2^11111121213 is an apocalyptic number.

It is an amenable number.

11111121213 is a deficient number, since it is larger than the sum of its proper divisors (3704491587).

11111121213 is a wasteful number, since it uses less digits than its factorization.

11111121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196131.

The product of its digits is 12, while the sum is 15.

Adding to 11111121213 its reverse (31212111111), we get a palindrome (42323232324).

The spelling of 11111121213 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirteen".