121201801 has 4 divisors (see below), whose sum is σ = 138516352. Its totient is φ = 103887252.

The previous prime is 121201799. The next prime is 121201807. The reversal of 121201801 is 108102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 108102121 = 593 ⋅182297.

It is not a de Polignac number, because 121201801 - 2¹ = 121201799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657265 + ... + 8657278.

It is an arithmetic number, because the mean of its divisors is an integer number (34629088).

Almost surely, 2^121201801 is an apocalyptic number.

It is an amenable number.

121201801 is a deficient number, since it is larger than the sum of its proper divisors (17314551).

121201801 is an equidigital number, since it uses as much as digits as its factorization.

121201801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314550.

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

The square root of 121201801 is about 11009.1689513787. The cubic root of 121201801 is about 494.8835572786.

Adding to 121201801 its reverse (108102121), we get a palindrome (229303922).

The spelling of 121201801 in words is "one hundred twenty-one million, two hundred one thousand, eight hundred one".