121221112002 has 16 divisors (see below), whose sum is σ = 242555487552. Its totient is φ = 40388160080.

The previous prime is 121221111941. The next prime is 121221112007. The reversal of 121221112002 is 200211122121.

It is not an unprimeable number, because it can be changed into a prime (121221112007) 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, 4705398 + ... + 4731089.

It is an arithmetic number, because the mean of its divisors is an integer number (15159717972).

Almost surely, 2^121221112002 is an apocalyptic number.

121221112002 is an abundant number, since it is smaller than the sum of its proper divisors (121334375550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221112002 is a wasteful number, since it uses less digits than its factorization.

121221112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438633.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221112002 its reverse (200211122121), we get a palindrome (321432234123).

The spelling of 121221112002 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, two".