121606431 has 8 divisors (see below), whose sum is σ = 162815664. Its totient is φ = 80734080.

The previous prime is 121606417. The next prime is 121606439. The reversal of 121606431 is 134606121.

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

It is not a de Polignac number, because 121606431 - 2⁵ = 121606399 is a prime.

It is a super-2 number, since 2×121606431² = 29576248121115522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121606439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83376 + ... + 84821.

It is an arithmetic number, because the mean of its divisors is an integer number (20351958).

Almost surely, 2^121606431 is an apocalyptic number.

121606431 is a deficient number, since it is larger than the sum of its proper divisors (41209233).

121606431 is a wasteful number, since it uses less digits than its factorization.

121606431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168441.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121606431 is about 11027.5305939272. The cubic root of 121606431 is about 495.4336654638.

The spelling of 121606431 in words is "one hundred twenty-one million, six hundred six thousand, four hundred thirty-one".