121970827 has 4 divisors (see below), whose sum is σ = 133059096. Its totient is φ = 110882560.

The previous prime is 121970813. The next prime is 121970831. The reversal of 121970827 is 728079121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121970827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121970837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5544118 + ... + 5544139.

It is an arithmetic number, because the mean of its divisors is an integer number (33264774).

Almost surely, 2^121970827 is an apocalyptic number.

121970827 is a deficient number, since it is larger than the sum of its proper divisors (11088269).

121970827 is a wasteful number, since it uses less digits than its factorization.

121970827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11088268.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 121970827 is about 11044.0403385717. The cubic root of 121970827 is about 495.9280308234.

The spelling of 121970827 in words is "one hundred twenty-one million, nine hundred seventy thousand, eight hundred twenty-seven".