121281667 has 12 divisors (see below), whose sum is σ = 134131680. Its totient is φ = 109563168.

The previous prime is 121281659. The next prime is 121281697. The reversal of 121281667 is 766182121.

It is not a de Polignac number, because 121281667 - 2³ = 121281659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121281637) 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, 309 + ... + 15577.

It is an arithmetic number, because the mean of its divisors is an integer number (11177640).

Almost surely, 2^121281667 is an apocalyptic number.

121281667 is a deficient number, since it is larger than the sum of its proper divisors (12850013).

121281667 is a wasteful number, since it uses less digits than its factorization.

121281667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15342 (or 15329 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 121281667 is about 11012.7956032971. The cubic root of 121281667 is about 494.9922346842.

The spelling of 121281667 in words is "one hundred twenty-one million, two hundred eighty-one thousand, six hundred sixty-seven".