21021200002 has 16 divisors (see below), whose sum is σ = 34440876000. Its totient is φ = 9543271840.

The previous prime is 21021199973. The next prime is 21021200023. The reversal of 21021200002 is 20000212012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572752 + ... + 608347.

It is an arithmetic number, because the mean of its divisors is an integer number (2152554750).

Almost surely, 2^21021200002 is an apocalyptic number.

21021200002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021200002 is a deficient number, since it is larger than the sum of its proper divisors (13419675998).

21021200002 is a wasteful number, since it uses less digits than its factorization.

21021200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181921.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21021200002 its reverse (20000212012), we get a palindrome (41021412014).

It can be divided in two parts, 210 and 21200002, that added together give a palindrome (21200212).

The spelling of 21021200002 in words is "twenty-one billion, twenty-one million, two hundred thousand, two".