121681273 has 8 divisors (see below), whose sum is σ = 139180160. Its totient is φ = 104211360.

The previous prime is 121681267. The next prime is 121681279. The reversal of 121681273 is 372186121.

It is an interprime number because it is at equal distance from previous prime (121681267) and next prime (121681279).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121681273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121681279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (17397520).

Almost surely, 2^121681273 is an apocalyptic number.

It is an amenable number.

121681273 is a deficient number, since it is larger than the sum of its proper divisors (17498887).

121681273 is a wasteful number, since it uses less digits than its factorization.

121681273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14487.

The product of its digits is 4032, while the sum is 31.

The square root of 121681273 is about 11030.9234880857. The cubic root of 121681273 is about 495.5352819160.

The spelling of 121681273 in words is "one hundred twenty-one million, six hundred eighty-one thousand, two hundred seventy-three".