121121122201001 has 4 divisors (see below), whose sum is σ = 130438131601092. Its totient is φ = 111804112800912.

The previous prime is 121121122200997. The next prime is 121121122201007. The reversal of 121121122201001 is 100102221121121.

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 33832556363776 + 87288565837225 = 5816576^2 + 9342835^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121122201001 - 2² = 121121122200997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121121122201007) 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, 4658504700026 + ... + 4658504700051.

It is an arithmetic number, because the mean of its divisors is an integer number (32609532900273).

Almost surely, 2^{121121122201001} is an apocalyptic number.

It is an amenable number.

121121122201001 is a deficient number, since it is larger than the sum of its proper divisors (9317009400091).

121121122201001 is an equidigital number, since it uses as much as digits as its factorization.

121121122201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9317009400090.

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

Adding to 121121122201001 its reverse (100102221121121), we get a palindrome (221223343322122).

The spelling of 121121122201001 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred one thousand, one".