2121120101100 has 576 divisors, whose sum is σ = 8462780347392. Its totient is φ = 395850240000.

The previous prime is 2121120101059. The next prime is 2121120101117. The reversal of 2121120101100 is 11010211212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11015650 + ... + 11206550.

It is an arithmetic number, because the mean of its divisors is an integer number (14692326992).

Almost surely, 2^{2121120101100} is an apocalyptic number.

2121120101100 is a gapful number since it is divisible by the number (20) 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 2121120101100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4231390173696).

2121120101100 is an abundant number, since it is smaller than the sum of its proper divisors (6341660246292).

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

2121120101100 is a wasteful number, since it uses less digits than its factorization.

2121120101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190986 (or 190979 counting only the distinct ones).

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

Adding to 2121120101100 its reverse (11010211212), we get a palindrome (2132130312312).

The spelling of 2121120101100 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred one thousand, one hundred".