121606443 has 12 divisors (see below), whose sum is σ = 200747248. Its totient is φ = 69489360.

The previous prime is 121606439. The next prime is 121606469. The reversal of 121606443 is 344606121.

121606443 is a `hidden beast` number, since 1 + 2 + 16 + 0 + 644 + 3 = 666.

It is not a de Polignac number, because 121606443 - 2² = 121606439 is a prime.

It is a super-2 number, since 2×121606443² = 29576253958224498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121606843) 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, 965068 + ... + 965193.

Almost surely, 2^121606443 is an apocalyptic number.

121606443 is a deficient number, since it is larger than the sum of its proper divisors (79140805).

121606443 is a wasteful number, since it uses less digits than its factorization.

121606443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930274 (or 1930271 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 121606443 is about 11027.5311380200. The cubic root of 121606443 is about 495.4336817601.

The spelling of 121606443 in words is "one hundred twenty-one million, six hundred six thousand, four hundred forty-three".