21210002221011 has 16 divisors (see below), whose sum is σ = 29891944621440. Its totient is φ = 13340206673280.

The previous prime is 21210002220997. The next prime is 21210002221019. The reversal of 21210002221011 is 11012220001212.

It is not a de Polignac number, because 21210002221011 - 2¹¹ = 21210002218963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210002221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771988965 + ... + 772016438.

It is an arithmetic number, because the mean of its divisors is an integer number (1868246538840).

Almost surely, 2^{21210002221011} is an apocalyptic number.

21210002221011 is a deficient number, since it is larger than the sum of its proper divisors (8681942400429).

21210002221011 is a wasteful number, since it uses less digits than its factorization.

21210002221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544005666.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210002221011 its reverse (11012220001212), we get a palindrome (32222222222223).

The spelling of 21210002221011 in words is "twenty-one trillion, two hundred ten billion, two million, two hundred twenty-one thousand, eleven".