21101001202211 has 16 divisors (see below), whose sum is σ = 24181886337024. Its totient is φ = 18036743809824.

The previous prime is 21101001202163. The next prime is 21101001202249. The reversal of 21101001202211 is 11220210010112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101001202211 is a prime.

It is a super-2 number, since 2×21101001202211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101001202511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18113681 + ... + 19243373.

It is an arithmetic number, because the mean of its divisors is an integer number (1511367896064).

Almost surely, 2^{21101001202211} is an apocalyptic number.

21101001202211 is a deficient number, since it is larger than the sum of its proper divisors (3080885134813).

21101001202211 is a wasteful number, since it uses less digits than its factorization.

21101001202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137050.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101001202211 its reverse (11220210010112), we get a palindrome (32321211212323).

The spelling of 21101001202211 in words is "twenty-one trillion, one hundred one billion, one million, two hundred two thousand, two hundred eleven".