111211102102 has 4 divisors (see below), whose sum is σ = 166816653156. Its totient is φ = 55605551050.

The previous prime is 111211102091. The next prime is 111211102103. The reversal of 111211102102 is 201201112111.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211102103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27802775524 + ... + 27802775527.

It is an arithmetic number, because the mean of its divisors is an integer number (41704163289).

Almost surely, 2^111211102102 is an apocalyptic number.

111211102102 is a deficient number, since it is larger than the sum of its proper divisors (55605551054).

111211102102 is an equidigital number, since it uses as much as digits as its factorization.

111211102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55605551053.

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

Adding to 111211102102 its reverse (201201112111), we get a palindrome (312412214213).

The spelling of 111211102102 in words is "one hundred eleven billion, two hundred eleven million, one hundred two thousand, one hundred two".