10121020002 has 24 divisors (see below), whose sum is σ = 21941865036. Its totient is φ = 3371675136.

The previous prime is 10121019991. The next prime is 10121020009. The reversal of 10121020002 is 20002012101.

It can be written as a sum of positive squares in 2 ways, for example, as 8390376801 + 1730643201 = 91599^2 + 41601^2 .

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 (10121020009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135123 + ... + 196214.

Almost surely, 2^10121020002 is an apocalyptic number.

10121020002 is an abundant number, since it is smaller than the sum of its proper divisors (11820845034).

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

10121020002 is a wasteful number, since it uses less digits than its factorization.

10121020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333042 (or 333039 counting only the distinct ones).

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

Adding to 10121020002 its reverse (20002012101), we get a palindrome (30123032103).

The spelling of 10121020002 in words is "ten billion, one hundred twenty-one million, twenty thousand, two".