21100100012002 has 16 divisors (see below), whose sum is σ = 34527630037824. Its totient is φ = 9590900758000.

The previous prime is 21100100011961. The next prime is 21100100012003. The reversal of 21100100012002 is 20021000100112.

It is a self number, because there is not a number n which added to its sum of digits gives 21100100012002.

It is not an unprimeable number, because it can be changed into a prime (21100100012003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464552 + ... + 6659212.

It is an arithmetic number, because the mean of its divisors is an integer number (2157976877364).

Almost surely, 2^{21100100012002} is an apocalyptic number.

21100100012002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21100100012002 is a deficient number, since it is larger than the sum of its proper divisors (13427530025822).

21100100012002 is a wasteful number, since it uses less digits than its factorization.

21100100012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379305.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21100100012002 its reverse (20021000100112), we get a palindrome (41121100112114).

The spelling of 21100100012002 in words is "twenty-one trillion, one hundred billion, one hundred million, twelve thousand, two".