121002243 has 16 divisors (see below), whose sum is σ = 171157536. Its totient is φ = 75776000.

The previous prime is 121002199. The next prime is 121002251. The reversal of 121002243 is 342200121.

It is a cyclic number.

It is not a de Polignac number, because 121002243 - 2⁶ = 121002179 is a prime.

It is a super-2 number, since 2×121002243² = 29283085622062098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121002263) 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 15 ways as a sum of consecutive naturals, for example, 28243 + ... + 32243.

It is an arithmetic number, because the mean of its divisors is an integer number (10697346).

Almost surely, 2^121002243 is an apocalyptic number.

121002243 is a deficient number, since it is larger than the sum of its proper divisors (50155293).

121002243 is a wasteful number, since it uses less digits than its factorization.

121002243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 121002243 is about 11000.1019540730. The cubic root of 121002243 is about 494.6118005248.

Adding to 121002243 its reverse (342200121), we get a palindrome (463202364).

The spelling of 121002243 in words is "one hundred twenty-one million, two thousand, two hundred forty-three".