121121221201 has 4 divisors (see below), whose sum is σ = 121122634804. Its totient is φ = 121119807600.

The previous prime is 121121221139. The next prime is 121121221229. The reversal of 121121221201 is 102122121121.

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 35987987025 + 85133234176 = 189705^2 + 291776^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121221201 - 2²³ = 121112832593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569370 + ... + 752611.

It is an arithmetic number, because the mean of its divisors is an integer number (30280658701).

Almost surely, 2^121121221201 is an apocalyptic number.

It is an amenable number.

121121221201 is a deficient number, since it is larger than the sum of its proper divisors (1413603).

121121221201 is an equidigital number, since it uses as much as digits as its factorization.

121121221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121121221201 its reverse (102122121121), we get a palindrome (223243342322).

The spelling of 121121221201 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".