102111111202 has 4 divisors (see below), whose sum is σ = 153166666806. Its totient is φ = 51055555600.

The previous prime is 102111111199. The next prime is 102111111217. The reversal of 102111111202 is 202111111201.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 102086001081 + 25110121 = 319509^2 + 5011^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527777799 + ... + 25527777802.

Almost surely, 2^102111111202 is an apocalyptic number.

102111111202 is a deficient number, since it is larger than the sum of its proper divisors (51055555604).

102111111202 is an equidigital number, since it uses as much as digits as its factorization.

102111111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51055555603.

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

Adding to 102111111202 its reverse (202111111201), we get a palindrome (304222222403).

Subtracting 102111111202 from its reverse (202111111201), we obtain a palindrome (99999999999).

The spelling of 102111111202 in words is "one hundred two billion, one hundred eleven million, one hundred eleven thousand, two hundred two".