10221121212222 has 16 divisors (see below), whose sum is σ = 20458768100112. Its totient is φ = 3404286124800.

The previous prime is 10221121212167. The next prime is 10221121212227. The reversal of 10221121212222 is 22221212112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221121212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688561779 + ... + 688576622.

It is an arithmetic number, because the mean of its divisors is an integer number (1278673006257).

Almost surely, 2^{10221121212222} is an apocalyptic number.

10221121212222 is an abundant number, since it is smaller than the sum of its proper divisors (10237646887890).

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

10221121212222 is a wasteful number, since it uses less digits than its factorization.

10221121212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377139643.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 10221121212222 its reverse (22221212112201), we get a palindrome (32442333324423).

The spelling of 10221121212222 in words is "ten trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".