21021000101002 has 48 divisors (see below), whose sum is σ = 36850878771840. Its totient is φ = 8955313431680.

The previous prime is 21021000100999. The next prime is 21021000101039. The reversal of 21021000101002 is 20010100012012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021000101002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9706348 + ... + 11672839.

It is an arithmetic number, because the mean of its divisors is an integer number (767726641080).

Almost surely, 2^{21021000101002} is an apocalyptic number.

21021000101002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021000101002 is a deficient number, since it is larger than the sum of its proper divisors (15829878670838).

21021000101002 is a wasteful number, since it uses less digits than its factorization.

21021000101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21379467 (or 21379456 counting only the distinct ones).

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

Adding to 21021000101002 its reverse (20010100012012), we get a palindrome (41031100113014).

The spelling of 21021000101002 in words is "twenty-one trillion, twenty-one billion, one hundred one thousand, two".