120001102222121 has 4 divisors (see below), whose sum is σ = 120001131525972. Its totient is φ = 120001072918272.

The previous prime is 120001102222117. The next prime is 120001102222139. The reversal of 120001102222121 is 121222201100021.

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 78637681748521 + 41363420473600 = 8867789^2 + 6431440^2 .

It is a cyclic number.

It is not a de Polignac number, because 120001102222121 - 2² = 120001102222117 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 120001102222121.

It is not an unprimeable number, because it can be changed into a prime (120001102222151) 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, 7269416 + ... + 17112761.

It is an arithmetic number, because the mean of its divisors is an integer number (30000282881493).

Almost surely, 2^{120001102222121} is an apocalyptic number.

It is an amenable number.

120001102222121 is a deficient number, since it is larger than the sum of its proper divisors (29303851).

120001102222121 is an equidigital number, since it uses as much as digits as its factorization.

120001102222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29303850.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 120001102222121 its reverse (121222201100021), we get a palindrome (241223303322142).

The spelling of 120001102222121 in words is "one hundred twenty trillion, one billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".