121220111221102 has 16 divisors (see below), whose sum is σ = 182003054861952. Its totient is φ = 60552435743800.

The previous prime is 121220111221073. The next prime is 121220111221103. The reversal of 121220111221102 is 201122111022121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121220111221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111221103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23285727 + ... + 28011877.

It is an arithmetic number, because the mean of its divisors is an integer number (11375190928872).

Almost surely, 2^{121220111221102} is an apocalyptic number.

121220111221102 is a deficient number, since it is larger than the sum of its proper divisors (60782943640850).

121220111221102 is a wasteful number, since it uses less digits than its factorization.

121220111221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738343.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121220111221102 its reverse (201122111022121), we get a palindrome (322342222243223).

The spelling of 121220111221102 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, one hundred two".