21201122011102 has 16 divisors (see below), whose sum is σ = 34696061240832. Its totient is φ = 9635952493720.

The previous prime is 21201122011063. The next prime is 21201122011103. The reversal of 21201122011102 is 20111022110212.

It is a super-2 number, since 2×21201122011102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201122011103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45821968 + ... + 46282339.

It is an arithmetic number, because the mean of its divisors is an integer number (2168503827552).

Almost surely, 2^{21201122011102} is an apocalyptic number.

21201122011102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21201122011102 is a deficient number, since it is larger than the sum of its proper divisors (13494939229730).

21201122011102 is a wasteful number, since it uses less digits than its factorization.

21201122011102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92114783.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201122011102 its reverse (20111022110212), we get a palindrome (41312144121314).

The spelling of 21201122011102 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-two million, eleven thousand, one hundred two".