21201002210011 has 12 divisors (see below), whose sum is σ = 22957522485552. Its totient is φ = 19569964735776.

The previous prime is 21201002209949. The next prime is 21201002210053. The reversal of 21201002210011 is 11001220010212.

It is a de Polignac number, because none of the positive numbers 2^k-21201002210011 is a prime.

It is a super-2 number, since 2×21201002210011² (a number of 27 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201002209973 and 21201002210000.

It is not an unprimeable number, because it can be changed into a prime (21201002210111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18499650 + ... + 19612216.

It is an arithmetic number, because the mean of its divisors is an integer number (1913126873796).

Almost surely, 2^{21201002210011} is an apocalyptic number.

21201002210011 is a deficient number, since it is larger than the sum of its proper divisors (1756520275541).

21201002210011 is a wasteful number, since it uses less digits than its factorization.

21201002210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225350 (or 1225337 counting only the distinct ones).

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

Adding to 21201002210011 its reverse (11001220010212), we get a palindrome (32202222220223).

The spelling of 21201002210011 in words is "twenty-one trillion, two hundred one billion, two million, two hundred ten thousand, eleven".