121002121002 has 128 divisors (see below), whose sum is σ = 290105468928. Its totient is φ = 32931360000.

The previous prime is 121002120983. The next prime is 121002121007. The reversal of 121002121002 is 200121200121.

It is not an unprimeable number, because it can be changed into a prime (121002121007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12216252 + ... + 12226152.

It is an arithmetic number, because the mean of its divisors is an integer number (2266448976).

Almost surely, 2^121002121002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145052734464).

121002121002 is an abundant number, since it is smaller than the sum of its proper divisors (169103347926).

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

121002121002 is a wasteful number, since it uses less digits than its factorization.

121002121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121002121002 its reverse (200121200121), we get a palindrome (321123321123).

The spelling of 121002121002 in words is "one hundred twenty-one billion, two million, one hundred twenty-one thousand, two".