121010020002 has 24 divisors (see below), whose sum is σ = 262198038960. Its totient is φ = 40335186840.

The previous prime is 121010019983. The next prime is 121010020003. The reversal of 121010020002 is 200020010121.

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 (121010020003) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 449977 + ... + 666707.

It is an arithmetic number, because the mean of its divisors is an integer number (10924918290).

Almost surely, 2^121010020002 is an apocalyptic number.

121010020002 is an abundant number, since it is smaller than the sum of its proper divisors (141188018958).

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

121010020002 is a wasteful number, since it uses less digits than its factorization.

121010020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247758 (or 247755 counting only the distinct ones).

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

Adding to 121010020002 its reverse (200020010121), we get a palindrome (321030030123).

The spelling of 121010020002 in words is "one hundred twenty-one billion, ten million, twenty thousand, two".