21121120111102 has 24 divisors (see below), whose sum is σ = 34829775594936. Its totient is φ = 9598824510000.

The previous prime is 21121120111097. The next prime is 21121120111103. The reversal of 21121120111102 is 20111102112112.

It is a super-2 number, since 2×21121120111102² (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 (21121120111103) 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, 6274924 + ... + 9034207.

It is an arithmetic number, because the mean of its divisors is an integer number (1451240649789).

Almost surely, 2^{21121120111102} is an apocalyptic number.

21121120111102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121120111102 is a deficient number, since it is larger than the sum of its proper divisors (13708655483834).

21121120111102 is a wasteful number, since it uses less digits than its factorization.

21121120111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15314856 (or 15314845 counting only the distinct ones).

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

Adding to 21121120111102 its reverse (20111102112112), we get a palindrome (41232222223214).

The spelling of 21121120111102 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred two".