11212111102 has 4 divisors (see below), whose sum is σ = 16818166656. Its totient is φ = 5606055550.

The previous prime is 11212111087. The next prime is 11212111123. The reversal of 11212111102 is 20111121211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×11212111102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2803027774 + ... + 2803027777.

It is an arithmetic number, because the mean of its divisors is an integer number (4204541664).

Almost surely, 2^11212111102 is an apocalyptic number.

11212111102 is a deficient number, since it is larger than the sum of its proper divisors (5606055554).

11212111102 is an equidigital number, since it uses as much as digits as its factorization.

11212111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606055553.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212111102 its reverse (20111121211), we get a palindrome (31323232313).

The spelling of 11212111102 in words is "eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred two".