21011201002 has 16 divisors (see below), whose sum is σ = 34384240800. Its totient is φ = 9549913840.

The previous prime is 21011200999. The next prime is 21011201011. The reversal of 21011201002 is 20010211012.

It is a self number, because there is not a number n which added to its sum of digits gives 21011201002.

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, 530649 + ... + 568867.

It is an arithmetic number, because the mean of its divisors is an integer number (2149015050).

Almost surely, 2^21011201002 is an apocalyptic number.

21011201002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011201002 is a deficient number, since it is larger than the sum of its proper divisors (13373039798).

21011201002 is a wasteful number, since it uses less digits than its factorization.

21011201002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63221.

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

Adding to 21011201002 its reverse (20010211012), we get a palindrome (41021412014).

The spelling of 21011201002 in words is "twenty-one billion, eleven million, two hundred one thousand, two".