12101222112 has 48 divisors (see below), whose sum is σ = 36303668352. Its totient is φ = 3457491840.

The previous prime is 12101222101. The next prime is 12101222123. The reversal of 12101222112 is 21122210121.

It is an interprime number because it is at equal distance from previous prime (12101222101) and next prime (12101222123).

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 = 12101222091 and 12101222100.

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, 9003214 + ... + 9004557.

It is an arithmetic number, because the mean of its divisors is an integer number (756326424).

Almost surely, 2^12101222112 is an apocalyptic number.

12101222112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12101222112 is an abundant number, since it is smaller than the sum of its proper divisors (24202446240).

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

12101222112 is a wasteful number, since it uses less digits than its factorization.

12101222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18007791 (or 18007783 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12101222112 its reverse (21122210121), we get a palindrome (33223432233).

The spelling of 12101222112 in words is "twelve billion, one hundred one million, two hundred twenty-two thousand, one hundred twelve".