11111212022 has 4 divisors (see below), whose sum is σ = 16666818036. Its totient is φ = 5555606010.

The previous prime is 11111212009. The next prime is 11111212043. The reversal of 11111212022 is 22021211111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22021211111 = 1063 ⋅20716097.

It is a junction number, because it is equal to n+sod(n) for n = 11111211988 and 11111212006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777803004 + ... + 2777803007.

It is an arithmetic number, because the mean of its divisors is an integer number (4166704509).

Almost surely, 2^11111212022 is an apocalyptic number.

11111212022 is a deficient number, since it is larger than the sum of its proper divisors (5555606014).

11111212022 is an equidigital number, since it uses as much as digits as its factorization.

11111212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555606013.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111212022 its reverse (22021211111), we get a palindrome (33132423133).

The spelling of 11111212022 in words is "eleven billion, one hundred eleven million, two hundred twelve thousand, twenty-two".