21002011201210 has 128 divisors (see below), whose sum is σ = 43076784119040. Its totient is φ = 7308345139200.

The previous prime is 21002011201163. The next prime is 21002011201231. The reversal of 21002011201210 is 1210211020012.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1351386040 + ... + 1351401580.

It is an arithmetic number, because the mean of its divisors is an integer number (336537375930).

Almost surely, 2^{21002011201210} is an apocalyptic number.

21002011201210 is an abundant number, since it is smaller than the sum of its proper divisors (22074772917830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002011201210 is a wasteful number, since it uses less digits than its factorization.

21002011201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18384.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002011201210 its reverse (1210211020012), we get a palindrome (22212222221222).

The spelling of 21002011201210 in words is "twenty-one trillion, two billion, eleven million, two hundred one thousand, two hundred ten".