20210221121222 has 32 divisors (see below), whose sum is σ = 33841816968960. Its totient is φ = 8972441845920.

The previous prime is 20210221121183. The next prime is 20210221121239. The reversal of 20210221121222 is 22212112201202.

It is a junction number, because it is equal to n+sod(n) for n = 20210221121194 and 20210221121203.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22281104 + ... + 23170412.

It is an arithmetic number, because the mean of its divisors is an integer number (1057556780280).

Almost surely, 2^{20210221121222} is an apocalyptic number.

20210221121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20210221121222 is a deficient number, since it is larger than the sum of its proper divisors (13631595847738).

20210221121222 is a wasteful number, since it uses less digits than its factorization.

20210221121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913388.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20210221121222 its reverse (22212112201202), we get a palindrome (42422333322424).

The spelling of 20210221121222 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".