21201011012211 has 32 divisors (see below), whose sum is σ = 28682283555072. Its totient is φ = 13927763579520.

The previous prime is 21201011012183. The next prime is 21201011012239. The reversal of 21201011012211 is 11221011010212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21201011012183) and next prime (21201011012239).

It is not a de Polignac number, because 21201011012211 - 2¹⁵ = 21201010979443 is a prime.

It is a super-2 number, since 2×21201011012211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21201011012281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612498541 + ... + 612533153.

It is an arithmetic number, because the mean of its divisors is an integer number (896321361096).

Almost surely, 2^{21201011012211} is an apocalyptic number.

21201011012211 is a deficient number, since it is larger than the sum of its proper divisors (7481272542861).

21201011012211 is a wasteful number, since it uses less digits than its factorization.

21201011012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40963.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21201011012211 its reverse (11221011010212), we get a palindrome (32422022022423).

The spelling of 21201011012211 in words is "twenty-one trillion, two hundred one billion, eleven million, twelve thousand, two hundred eleven".