12101221102 has 4 divisors (see below), whose sum is σ = 18151831656. Its totient is φ = 6050610550.

The previous prime is 12101221091. The next prime is 12101221103. The reversal of 12101221102 is 20112210121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20112210121 = 89 ⋅225979889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3025305274 + ... + 3025305277.

It is an arithmetic number, because the mean of its divisors is an integer number (4537957914).

Almost surely, 2^12101221102 is an apocalyptic number.

12101221102 is a deficient number, since it is larger than the sum of its proper divisors (6050610554).

12101221102 is an equidigital number, since it uses as much as digits as its factorization.

12101221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050610553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12101221102 its reverse (20112210121), we get a palindrome (32213431223).

The spelling of 12101221102 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred two".