120000121222021 has 4 divisors (see below), whose sum is σ = 120006560051692. Its totient is φ = 119993682392352.

The previous prime is 120000121221961. The next prime is 120000121222099. The reversal of 120000121222021 is 120222121000021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32725550390625 + 87274570831396 = 5720625^2 + 9342086^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000121222021 - 2¹⁵ = 120000121189253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120000121221986 and 120000121222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000121222621) 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 3 ways as a sum of consecutive naturals, for example, 3219386880 + ... + 3219424153.

It is an arithmetic number, because the mean of its divisors is an integer number (30001640012923).

Almost surely, 2^{120000121222021} is an apocalyptic number.

It is an amenable number.

120000121222021 is a deficient number, since it is larger than the sum of its proper divisors (6438829671).

120000121222021 is an equidigital number, since it uses as much as digits as its factorization.

120000121222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438829670.

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

Adding to 120000121222021 its reverse (120222121000021), we get a palindrome (240222242222042).

The spelling of 120000121222021 in words is "one hundred twenty trillion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".