2121221011206 has 16 divisors (see below), whose sum is σ = 4628118570048. Its totient is φ = 642794245800.

The previous prime is 2121221011187. The next prime is 2121221011207. The reversal of 2121221011206 is 6021101221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121221011207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16069856080 + ... + 16069856211.

It is an arithmetic number, because the mean of its divisors is an integer number (289257410628).

Almost surely, 2^{2121221011206} is an apocalyptic number.

2121221011206 is an abundant number, since it is smaller than the sum of its proper divisors (2506897558842).

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

2121221011206 is a wasteful number, since it uses less digits than its factorization.

2121221011206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32139712307.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 2121221011206 its reverse (6021101221212), we get a palindrome (8142322232418).

The spelling of 2121221011206 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred six".