121221211001012 has 24 divisors (see below), whose sum is σ = 215285194634496. Its totient is φ = 59716759442688.

The previous prime is 121221211000997. The next prime is 121221211001017. The reversal of 121221211001012 is 210100112122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221211001017) 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 in 7 ways as a sum of consecutive naturals, for example, 700419758 + ... + 700592805.

It is an arithmetic number, because the mean of its divisors is an integer number (8970216443104).

Almost surely, 2^{121221211001012} is an apocalyptic number.

It is an amenable number.

121221211001012 is a deficient number, since it is larger than the sum of its proper divisors (94063983633484).

121221211001012 is a wasteful number, since it uses less digits than its factorization.

121221211001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401012887 (or 1401012885 counting only the distinct ones).

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

Adding to 121221211001012 its reverse (210100112122121), we get a palindrome (331321323123133).

The spelling of 121221211001012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, one thousand, twelve".