121694507 has 4 divisors (see below), whose sum is σ = 132757656. Its totient is φ = 110631360.

The previous prime is 121694501. The next prime is 121694509. The reversal of 121694507 is 705496121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705496121 = 11 ⋅64136011.

It is a cyclic number.

It is not a de Polignac number, because 121694507 - 2¹² = 121690411 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121694501) 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 3 ways as a sum of consecutive naturals, for example, 5531558 + ... + 5531579.

It is an arithmetic number, because the mean of its divisors is an integer number (33189414).

Almost surely, 2^121694507 is an apocalyptic number.

121694507 is a deficient number, since it is larger than the sum of its proper divisors (11063149).

121694507 is a wasteful number, since it uses less digits than its factorization.

121694507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063148.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 121694507 is about 11031.5233308913. The cubic root of 121694507 is about 495.5532459956.

The spelling of 121694507 in words is "one hundred twenty-one million, six hundred ninety-four thousand, five hundred seven".