121100212110212 has 24 divisors (see below), whose sum is σ = 224422766229816. Its totient is φ = 56980412131328.

The previous prime is 121100212110203. The next prime is 121100212110217. The reversal of 121100212110212 is 212011212001121.

It can be written as a sum of positive squares in 4 ways, for example, as 10373964906496 + 110726247203716 = 3220864^2 + 10522654^2 .

It is a super-2 number, since 2×121100212110212² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (121100212110217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123303833 + ... + 124282080.

It is an arithmetic number, because the mean of its divisors is an integer number (9350948592909).

Almost surely, 2^{121100212110212} is an apocalyptic number.

It is an amenable number.

121100212110212 is a deficient number, since it is larger than the sum of its proper divisors (103322554119604).

121100212110212 is a wasteful number, since it uses less digits than its factorization.

121100212110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247593127 (or 247593125 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121100212110212 its reverse (212011212001121), we get a palindrome (333111424111333).

The spelling of 121100212110212 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, one hundred ten thousand, two hundred twelve".