121201775 has 6 divisors (see below), whose sum is σ = 150290232. Its totient is φ = 96961400.

The previous prime is 121201771. The next prime is 121201777. The reversal of 121201775 is 577102121.

It is not a de Polignac number, because 121201775 - 2² = 121201771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2424011 + ... + 2424060.

It is an arithmetic number, because the mean of its divisors is an integer number (25048372).

Almost surely, 2^121201775 is an apocalyptic number.

121201775 is a deficient number, since it is larger than the sum of its proper divisors (29088457).

121201775 is an equidigital number, since it uses as much as digits as its factorization.

121201775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848081 (or 4848076 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 121201775 is about 11009.1677705447. The cubic root of 121201775 is about 494.8835218915.

Adding to 121201775 its reverse (577102121), we get a palindrome (698303896).

The spelling of 121201775 in words is "one hundred twenty-one million, two hundred one thousand, seven hundred seventy-five".