121005061002 has 160 divisors (see below), whose sum is σ = 317804838912. Its totient is φ = 33833659824.

The previous prime is 121005060997. The next prime is 121005061013. The reversal of 121005061002 is 200160500121.

121005061002 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 0 + 50 + 610 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12946743 + ... + 12956085.

Almost surely, 2^121005061002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121005061002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158902419456).

121005061002 is an abundant number, since it is smaller than the sum of its proper divisors (196799777910).

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

121005061002 is an frugal number, since it uses more digits than its factorization.

121005061002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426 (or 9402 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 121005061002 its reverse (200160500121), we get a palindrome (321165561123).

The spelling of 121005061002 in words is "one hundred twenty-one billion, five million, sixty-one thousand, two".