121200001002 has 16 divisors (see below), whose sum is σ = 269333335680. Its totient is φ = 40400000316.

The previous prime is 121200001001. The next prime is 121200001009. The reversal of 121200001002 is 200100002121.

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

It is not an unprimeable number, because it can be changed into a prime (121200001001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122222178 + ... + 1122222285.

It is an arithmetic number, because the mean of its divisors is an integer number (16833333480).

Almost surely, 2^121200001002 is an apocalyptic number.

121200001002 is an abundant number, since it is smaller than the sum of its proper divisors (148133334678).

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

121200001002 is a wasteful number, since it uses less digits than its factorization.

121200001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244444474 (or 2244444468 counting only the distinct ones).

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

Adding to 121200001002 its reverse (200100002121), we get a palindrome (321300003123).

The spelling of 121200001002 in words is "one hundred twenty-one billion, two hundred million, one thousand, two".