121122222120101 has 4 divisors (see below), whose sum is σ = 125298850469100. Its totient is φ = 116945593771104.

The previous prime is 121122222120079. The next prime is 121122222120113. The reversal of 121122222120101 is 101021222221121.

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 46442793861025 + 74679428259076 = 6814895^2 + 8641726^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122222120101 - 2¹⁸ = 121122221857957 is a prime.

It is a super-2 number, since 2×121122222120101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122222120401) 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, 2088314174456 + ... + 2088314174513.

It is an arithmetic number, because the mean of its divisors is an integer number (31324712617275).

Almost surely, 2^{121122222120101} is an apocalyptic number.

It is an amenable number.

121122222120101 is a deficient number, since it is larger than the sum of its proper divisors (4176628348999).

121122222120101 is an equidigital number, since it uses as much as digits as its factorization.

121122222120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176628348998.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121122222120101 its reverse (101021222221121), we get a palindrome (222143444341222).

The spelling of 121122222120101 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred one".