100002120012 has 18 divisors (see below), whose sum is σ = 252783136788. Its totient is φ = 33334039992.

The previous prime is 100002120011. The next prime is 100002120013. The reversal of 100002120012 is 210021200001.

It is an interprime number because it is at equal distance from previous prime (100002120011) and next prime (100002120013).

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 100002119976 and 100002120003.

It is not an unprimeable number, because it can be changed into a prime (100002120011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1388918298 + ... + 1388918369.

Almost surely, 2^100002120012 is an apocalyptic number.

100002120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100002120012 is an abundant number, since it is smaller than the sum of its proper divisors (152781016776).

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

100002120012 is a wasteful number, since it uses less digits than its factorization.

100002120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777836677 (or 2777836672 counting only the distinct ones).

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

Adding to 100002120012 its reverse (210021200001), we get a palindrome (310023320013).

The spelling of 100002120012 in words is "one hundred billion, two million, one hundred twenty thousand, twelve".