121001002002 has 24 divisors (see below), whose sum is σ = 264619017936. Its totient is φ = 39956716536.

The previous prime is 121001001997. The next prime is 121001002079. The reversal of 121001002002 is 200200100121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31410588 + ... + 31414439.

It is an arithmetic number, because the mean of its divisors is an integer number (11025792414).

Almost surely, 2^121001002002 is an apocalyptic number.

121001002002 is an abundant number, since it is smaller than the sum of its proper divisors (143618015934).

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

121001002002 is a wasteful number, since it uses less digits than its factorization.

121001002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62825142 (or 62825139 counting only the distinct ones).

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

Adding to 121001002002 its reverse (200200100121), we get a palindrome (321201102123).

The spelling of 121001002002 in words is "one hundred twenty-one billion, one million, two thousand, two".