121677621 has 16 divisors (see below), whose sum is σ = 175124544. Its totient is φ = 74703744.

The previous prime is 121677607. The next prime is 121677631. The reversal of 121677621 is 126776121.

It is not a de Polignac number, because 121677621 - 2²³ = 113289013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121677631) 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 15 ways as a sum of consecutive naturals, for example, 14410 + ... + 21236.

It is an arithmetic number, because the mean of its divisors is an integer number (10945284).

Almost surely, 2^121677621 is an apocalyptic number.

It is an amenable number.

121677621 is a deficient number, since it is larger than the sum of its proper divisors (53446923).

121677621 is a wasteful number, since it uses less digits than its factorization.

121677621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300.

The product of its digits is 7056, while the sum is 33.

The square root of 121677621 is about 11030.7579521989. The cubic root of 121677621 is about 495.5303243935.

The spelling of 121677621 in words is "one hundred twenty-one million, six hundred seventy-seven thousand, six hundred twenty-one".