1211102102 has 16 divisors (see below), whose sum is σ = 2076622080. Its totient is φ = 518932008.

The previous prime is 1211102069. The next prime is 1211102129. The reversal of 1211102102 is 2012011121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118853 + ... + 128639.

It is an arithmetic number, because the mean of its divisors is an integer number (129788880).

Almost surely, 2^1211102102 is an apocalyptic number.

1211102102 is a deficient number, since it is larger than the sum of its proper divisors (865519978).

1211102102 is an equidigital number, since it uses as much as digits as its factorization.

1211102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18635.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211102102 is about 34800.8922586764. The cubic root of 1211102102 is about 1065.9256654104.

Adding to 1211102102 its reverse (2012011121), we get a palindrome (3223113223).

The spelling of 1211102102 in words is "one billion, two hundred eleven million, one hundred two thousand, one hundred two".