121143621 has 8 divisors (see below), whose sum is σ = 164173024. Its totient is φ = 79438320.

The previous prime is 121143619. The next prime is 121143623. The reversal of 121143621 is 126341121.

It is an interprime number because it is at equal distance from previous prime (121143619) and next prime (121143623).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121143621 - 2¹ = 121143619 is a prime.

It is a super-3 number, since 3×121143621³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330811 + ... + 331176.

It is an arithmetic number, because the mean of its divisors is an integer number (20521628).

Almost surely, 2^121143621 is an apocalyptic number.

It is an amenable number.

121143621 is a deficient number, since it is larger than the sum of its proper divisors (43029403).

121143621 is an equidigital number, since it uses as much as digits as its factorization.

121143621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662051.

The product of its digits is 288, while the sum is 21.

The square root of 121143621 is about 11006.5262912510. The cubic root of 121143621 is about 494.8043589681.

Adding to 121143621 its reverse (126341121), we get a palindrome (247484742).

The spelling of 121143621 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred twenty-one".