111222121102 has 4 divisors (see below), whose sum is σ = 166833181656. Its totient is φ = 55611060550.

The previous prime is 111222121081. The next prime is 111222121133. The reversal of 111222121102 is 201121222111.

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

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, 27805530274 + ... + 27805530277.

It is an arithmetic number, because the mean of its divisors is an integer number (41708295414).

Almost surely, 2^111222121102 is an apocalyptic number.

111222121102 is a deficient number, since it is larger than the sum of its proper divisors (55611060554).

111222121102 is an equidigital number, since it uses as much as digits as its factorization.

111222121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55611060553.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111222121102 its reverse (201121222111), we get a palindrome (312343343213).

It can be divided in two parts, 111222 and 121102, that added together give a square (232324 = 482²).

The spelling of 111222121102 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred two".