121443413 has 12 divisors (see below), whose sum is σ = 152138700. Its totient is φ = 96086592.

The previous prime is 121443409. The next prime is 121443431. The reversal of 121443413 is 314344121.

It can be written as a sum of positive squares in 2 ways, for example, as 19695844 + 101747569 = 4438^2 + 10087^2 .

It is not a de Polignac number, because 121443413 - 2² = 121443409 is a prime.

It is a super-2 number, since 2×121443413² = 29497005122177138, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121443433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94688 + ... + 95961.

It is an arithmetic number, because the mean of its divisors is an integer number (12678225).

Almost surely, 2^121443413 is an apocalyptic number.

121443413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121443413 is a deficient number, since it is larger than the sum of its proper divisors (30695287).

121443413 is a wasteful number, since it uses less digits than its factorization.

121443413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190676 (or 190669 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 121443413 is about 11020.1367051412. The cubic root of 121443413 is about 495.2121839713.

Adding to 121443413 its reverse (314344121), we get a palindrome (435787534).

The spelling of 121443413 in words is "one hundred twenty-one million, four hundred forty-three thousand, four hundred thirteen".