121261443 has 4 divisors (see below), whose sum is σ = 161681928. Its totient is φ = 80840960.

The previous prime is 121261433. The next prime is 121261463. The reversal of 121261443 is 344162121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344162121 = 3 ⋅114720707.

It is a cyclic number.

It is not a de Polignac number, because 121261443 - 2¹⁷ = 121130371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121261433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20210238 + ... + 20210243.

It is an arithmetic number, because the mean of its divisors is an integer number (40420482).

Almost surely, 2^121261443 is an apocalyptic number.

121261443 is a deficient number, since it is larger than the sum of its proper divisors (40420485).

121261443 is an equidigital number, since it uses as much as digits as its factorization.

121261443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40420484.

The product of its digits is 1152, while the sum is 24.

The square root of 121261443 is about 11011.8773603777. The cubic root of 121261443 is about 494.9647194526.

The spelling of 121261443 in words is "one hundred twenty-one million, two hundred sixty-one thousand, four hundred forty-three".