12210121012100 has 72 divisors (see below), whose sum is σ = 28916955946368. Its totient is φ = 4438159292800.

The previous prime is 12210121012097. The next prime is 12210121012123. The reversal of 12210121012100 is 121012101221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237989 + ... + 4947411.

It is an arithmetic number, because the mean of its divisors is an integer number (401624388144).

Almost surely, 2^{12210121012100} is an apocalyptic number.

12210121012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12210121012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14458477973184).

12210121012100 is an abundant number, since it is smaller than the sum of its proper divisors (16706834934268).

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

12210121012100 is a wasteful number, since it uses less digits than its factorization.

12210121012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711805 (or 4711798 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12210121012100 its reverse (121012101221), we get a palindrome (12331133113321).

The spelling of 12210121012100 in words is "twelve trillion, two hundred ten billion, one hundred twenty-one million, twelve thousand, one hundred".