20210011221222 has 12 divisors (see below), whose sum is σ = 43788357646020. Its totient is φ = 6736670407068.

The previous prime is 20210011221209. The next prime is 20210011221233. The reversal of 20210011221222 is 22212211001202.

It is a happy number.

20210011221222 is a `hidden beast` number, since 2 + 0 + 210 + 0 + 11 + 221 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1122778401179 = 20210011221222 / (2 + 0 + 2 + 1 + 0 + 0 + 1 + 1 + 2 + 2 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20210011221195 and 20210011221204.

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, 561389200572 + ... + 561389200607.

It is an arithmetic number, because the mean of its divisors is an integer number (3649029803835).

Almost surely, 2^{20210011221222} is an apocalyptic number.

20210011221222 is an abundant number, since it is smaller than the sum of its proper divisors (23578346424798).

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

20210011221222 is a wasteful number, since it uses less digits than its factorization.

20210011221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122778401187 (or 1122778401184 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20210011221222 its reverse (22212211001202), we get a palindrome (42422222222424).

The spelling of 20210011221222 in words is "twenty trillion, two hundred ten billion, eleven million, two hundred twenty-one thousand, two hundred twenty-two".