21020120101222 has 32 divisors (see below), whose sum is σ = 36331850548224. Its totient is φ = 9031354869600.

The previous prime is 21020120101217. The next prime is 21020120101247. The reversal of 21020120101222 is 22210102102012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21020120101196 and 21020120101205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358357773 + ... + 358416424.

It is an arithmetic number, because the mean of its divisors is an integer number (1135370329632).

Almost surely, 2^{21020120101222} is an apocalyptic number.

21020120101222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21020120101222 is a deficient number, since it is larger than the sum of its proper divisors (15311730447002).

21020120101222 is a wasteful number, since it uses less digits than its factorization.

21020120101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716774284.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21020120101222 its reverse (22210102102012), we get a palindrome (43230222203234).

The spelling of 21020120101222 in words is "twenty-one trillion, twenty billion, one hundred twenty million, one hundred one thousand, two hundred twenty-two".