121661683 has 8 divisors (see below), whose sum is σ = 142931376. Its totient is φ = 102093600.

The previous prime is 121661681. The next prime is 121661737. The reversal of 121661683 is 386166121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121661683 - 2¹ = 121661681 is a prime.

It is a super-2 number, since 2×121661683² = 29603130220784978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121661681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425248 + ... + 425533.

It is an arithmetic number, because the mean of its divisors is an integer number (17866422).

Almost surely, 2^121661683 is an apocalyptic number.

121661683 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121661683 is a deficient number, since it is larger than the sum of its proper divisors (21269693).

121661683 is a wasteful number, since it uses less digits than its factorization.

121661683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850805.

The product of its digits is 10368, while the sum is 34.

The square root of 121661683 is about 11030.0354940499. The cubic root of 121661683 is about 495.5086876918.

The spelling of 121661683 in words is "one hundred twenty-one million, six hundred sixty-one thousand, six hundred eighty-three".