2121012111200 has 36 divisors (see below), whose sum is σ = 5177920818420. Its totient is φ = 848404844160.

The previous prime is 2121012111157. The next prime is 2121012111269. The reversal of 2121012111200 is 21112101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1325631770 + ... + 1325633369.

It is an arithmetic number, because the mean of its divisors is an integer number (143831133845).

Almost surely, 2^{2121012111200} is an apocalyptic number.

2121012111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121012111200 is an abundant number, since it is smaller than the sum of its proper divisors (3056908707220).

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

2121012111200 is a wasteful number, since it uses less digits than its factorization.

2121012111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651265159 (or 2651265146 counting only the distinct ones).

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

Adding to 2121012111200 its reverse (21112101212), we get a palindrome (2142124212412).

The spelling of 2121012111200 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred eleven thousand, two hundred".