120001020222221 has 8 divisors (see below), whose sum is σ = 120155196388920. Its totient is φ = 119846853105408.

The previous prime is 120001020222121. The next prime is 120001020222253. The reversal of 120001020222221 is 122222020100021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46703364648196 + 73297655574025 = 6833986^2 + 8561405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120001020222221 - 2¹⁸ = 120001019960077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120001020222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001020222121) 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, 24477305 + ... + 28967921.

It is an arithmetic number, because the mean of its divisors is an integer number (15019399548615).

Almost surely, 2^{120001020222221} is an apocalyptic number.

It is an amenable number.

120001020222221 is a deficient number, since it is larger than the sum of its proper divisors (154176166699).

120001020222221 is an equidigital number, since it uses as much as digits as its factorization.

120001020222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524943.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 120001020222221 its reverse (122222020100021), we get a palindrome (242223040322242).

The spelling of 120001020222221 in words is "one hundred twenty trillion, one billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".