121110021222101 has 4 divisors (see below), whose sum is σ = 121469398140012. Its totient is φ = 120750644304192.

The previous prime is 121110021222059. The next prime is 121110021222103. The reversal of 121110021222101 is 101222120011121.

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 36481962400900 + 84628058821201 = 6040030^2 + 9199351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121110021222101 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 121110021222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110021222103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179688458450 + ... + 179688459123.

It is an arithmetic number, because the mean of its divisors is an integer number (30367349535003).

Almost surely, 2^{121110021222101} is an apocalyptic number.

It is an amenable number.

121110021222101 is a deficient number, since it is larger than the sum of its proper divisors (359376917911).

121110021222101 is an equidigital number, since it uses as much as digits as its factorization.

121110021222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359376917910.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121110021222101 its reverse (101222120011121), we get a palindrome (222332141233222).

The spelling of 121110021222101 in words is "one hundred twenty-one trillion, one hundred ten billion, twenty-one million, two hundred twenty-two thousand, one hundred one".