121210111221102 has 24 divisors (see below), whose sum is σ = 262703543427936. Its totient is φ = 40390811055936.

The previous prime is 121210111221079. The next prime is 121210111221137. The reversal of 121210111221102 is 201122111012121.

It is a happy number.

121210111221102 is a `hidden beast` number, since 1 + 21 + 210 + 111 + 221 + 102 = 666.

It is a super-3 number, since 3×121210111221102³ (a number of 43 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1046553078 + ... + 1046668889.

It is an arithmetic number, because the mean of its divisors is an integer number (10945980976164).

Almost surely, 2^{121210111221102} is an apocalyptic number.

121210111221102 is an abundant number, since it is smaller than the sum of its proper divisors (141493432206834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121210111221102 is a wasteful number, since it uses less digits than its factorization.

121210111221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093225192 (or 2093225189 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121210111221102 its reverse (201122111012121), we get a palindrome (322332222233223).

The spelling of 121210111221102 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred two".