21010000100002 has 16 divisors (see below), whose sum is σ = 31530470280192. Its totient is φ = 10499844597840.

The previous prime is 21010000099969. The next prime is 21010000100003. The reversal of 21010000100002 is 20000100001012.

It is not an unprimeable number, because it can be changed into a prime (21010000100003) 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, 33540127 + ... + 34160797.

It is an arithmetic number, because the mean of its divisors is an integer number (1970654392512).

Almost surely, 2^{21010000100002} is an apocalyptic number.

21010000100002 is a deficient number, since it is larger than the sum of its proper divisors (10520470180190).

21010000100002 is a wasteful number, since it uses less digits than its factorization.

21010000100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628953.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21010000100002 its reverse (20000100001012), we get a palindrome (41010100101014).

The spelling of 21010000100002 in words is "twenty-one trillion, ten billion, one hundred thousand, two".