121221012221012 has 24 divisors (see below), whose sum is σ = 231454259037120. Its totient is φ = 55092763287360.

The previous prime is 121221012220999. The next prime is 121221012221063. The reversal of 121221012221012 is 210122210122121.

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 7 ways as a sum of consecutive naturals, for example, 192101753 + ... + 192731744.

It is an arithmetic number, because the mean of its divisors is an integer number (9643927459880).

Almost surely, 2^{121221012221012} is an apocalyptic number.

It is an amenable number.

121221012221012 is a deficient number, since it is larger than the sum of its proper divisors (110233246816108).

121221012221012 is a wasteful number, since it uses less digits than its factorization.

121221012221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384840671 (or 384840669 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121221012221012 its reverse (210122210122121), we get a palindrome (331343222343133).

The spelling of 121221012221012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twelve million, two hundred twenty-one thousand, twelve".