12101221110 has 64 divisors (see below), whose sum is σ = 32539532544. Its totient is φ = 2854339200.

The previous prime is 12101221103. The next prime is 12101221117. The reversal of 12101221110 is 1112210121.

It is an interprime number because it is at equal distance from previous prime (12101221103) and next prime (12101221117).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101221117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483336 + ... + 507755.

It is an arithmetic number, because the mean of its divisors is an integer number (508430196).

Almost surely, 2^12101221110 is an apocalyptic number.

12101221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12101221110 is an abundant number, since it is smaller than the sum of its proper divisors (20438311434).

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

12101221110 is a wasteful number, since it uses less digits than its factorization.

12101221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991149.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12101221110 its reverse (1112210121), we get a palindrome (13213431231).

The spelling of 12101221110 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred ten".