21211011110112 has 48 divisors (see below), whose sum is σ = 55733868786960. Its totient is φ = 7063357402112.

The previous prime is 21211011110057. The next prime is 21211011110137. The reversal of 21211011110112 is 21101111011212.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21211011110091 and 21211011110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108959037 + ... + 109153532.

It is an arithmetic number, because the mean of its divisors is an integer number (1161122266395).

Almost surely, 2^{21211011110112} is an apocalyptic number.

It is an amenable number.

21211011110112 is an abundant number, since it is smaller than the sum of its proper divisors (34522857676848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211011110112 is a wasteful number, since it uses less digits than its factorization.

21211011110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218113595 (or 218113587 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21211011110112 its reverse (21101111011212), we get a palindrome (42312122121324).

The spelling of 21211011110112 in words is "twenty-one trillion, two hundred eleven billion, eleven million, one hundred ten thousand, one hundred twelve".