12121011211112 has 8 divisors (see below), whose sum is σ = 22726896020850. Its totient is φ = 6060505605552.

The previous prime is 12121011211039. The next prime is 12121011211117. The reversal of 12121011211112 is 21111211012121.

It can be written as a sum of positive squares in only one way, i.e., 9883013163076 + 2237998048036 = 3143726^2 + 1495994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12121011211117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757563200687 + ... + 757563200702.

Almost surely, 2^{12121011211112} is an apocalyptic number.

It is an amenable number.

12121011211112 is a deficient number, since it is larger than the sum of its proper divisors (10605884809738).

12121011211112 is a wasteful number, since it uses less digits than its factorization.

12121011211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515126401395 (or 1515126401391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12121011211112 its reverse (21111211012121), we get a palindrome (33232222223233).

The spelling of 12121011211112 in words is "twelve trillion, one hundred twenty-one billion, eleven million, two hundred eleven thousand, one hundred twelve".