121112200021210 has 16 divisors (see below), whose sum is σ = 218698451928936. Its totient is φ = 48290104032768.

The previous prime is 121112200021199. The next prime is 121112200021217. The reversal of 121112200021210 is 12120002211121.

It can be written as a sum of positive squares in 4 ways, for example, as 72903437799201 + 48208762222009 = 8538351^2 + 6943253^2 .

It is not an unprimeable number, because it can be changed into a prime (121112200021217) 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, 19346993679 + ... + 19346999938.

Almost surely, 2^{121112200021210} is an apocalyptic number.

121112200021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121112200021210 is a deficient number, since it is larger than the sum of its proper divisors (97586251907726).

121112200021210 is a wasteful number, since it uses less digits than its factorization.

121112200021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38693993937.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121112200021210 its reverse (12120002211121), we get a palindrome (133232202232331).

The spelling of 121112200021210 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred million, twenty-one thousand, two hundred ten".