121690911 has 16 divisors (see below), whose sum is σ = 166789728. Its totient is φ = 78873600.

The previous prime is 121690909. The next prime is 121690937. The reversal of 121690911 is 119096121.

It is not a de Polignac number, because 121690911 - 2¹ = 121690909 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121690901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37431 + ... + 40551.

It is an arithmetic number, because the mean of its divisors is an integer number (10424358).

Almost surely, 2^121690911 is an apocalyptic number.

121690911 is a deficient number, since it is larger than the sum of its proper divisors (45098817).

121690911 is a wasteful number, since it uses less digits than its factorization.

121690911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482.

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 121690911 is about 11031.3603422243. The cubic root of 121690911 is about 495.5483648467.

The spelling of 121690911 in words is "one hundred twenty-one million, six hundred ninety thousand, nine hundred eleven".