121100020002 has 64 divisors (see below), whose sum is σ = 289861488000. Its totient is φ = 37255184064.

The previous prime is 121100019977. The next prime is 121100020043. The reversal of 121100020002 is 200020001121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5653749 + ... + 5675127.

It is an arithmetic number, because the mean of its divisors is an integer number (4529085750).

Almost surely, 2^121100020002 is an apocalyptic number.

121100020002 is an abundant number, since it is smaller than the sum of its proper divisors (168761467998).

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

121100020002 is a wasteful number, since it uses less digits than its factorization.

121100020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29472 (or 29466 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121100020002 its reverse (200020001121), we get a palindrome (321120021123).

The spelling of 121100020002 in words is "one hundred twenty-one billion, one hundred million, twenty thousand, two".