121144643 has 6 divisors (see below), whose sum is σ = 122984316. Its totient is φ = 119332092.

The previous prime is 121144613. The next prime is 121144691. The reversal of 121144643 is 346441121.

It is a happy number.

It is not a de Polignac number, because 121144643 - 2¹⁰ = 121143619 is a prime.

It is a super-3 number, since 3×121144643³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121144603) 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, 9005 + ... + 17982.

It is an arithmetic number, because the mean of its divisors is an integer number (20497386).

Almost surely, 2^121144643 is an apocalyptic number.

121144643 is a deficient number, since it is larger than the sum of its proper divisors (1839673).

121144643 is an frugal number, since it uses more digits than its factorization.

121144643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27121 (or 27054 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 121144643 is about 11006.5727181535. The cubic root of 121144643 is about 494.8057503982.

Adding to 121144643 its reverse (346441121), we get a palindrome (467585764).

It can be divided in two parts, 1211 and 44643, that added together give a palindrome (45854).

The spelling of 121144643 in words is "one hundred twenty-one million, one hundred forty-four thousand, six hundred forty-three".