21211002010002 has 64 divisors (see below), whose sum is σ = 48539071494144. Its totient is φ = 6053190493440.

The previous prime is 21211002009997. The next prime is 21211002010019. The reversal of 21211002010002 is 20001020011212.

It is a self number, because there is not a number n which added to its sum of digits gives 21211002010002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308664427 + ... + 308733137.

It is an arithmetic number, because the mean of its divisors is an integer number (758422992096).

Almost surely, 2^{21211002010002} is an apocalyptic number.

21211002010002 is an abundant number, since it is smaller than the sum of its proper divisors (27328069484142).

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

21211002010002 is a wasteful number, since it uses less digits than its factorization.

21211002010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77223.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211002010002 its reverse (20001020011212), we get a palindrome (41212022021214).

The spelling of 21211002010002 in words is "twenty-one trillion, two hundred eleven billion, two million, ten thousand, two".