121820829 has 8 divisors (see below), whose sum is σ = 174922272. Its totient is φ = 74966640.

The previous prime is 121820819. The next prime is 121820869. The reversal of 121820829 is 928028121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121820829 - 2¹⁵ = 121788061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121820829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121820819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561767 + ... + 1561844.

It is an arithmetic number, because the mean of its divisors is an integer number (21865284).

Almost surely, 2^121820829 is an apocalyptic number.

It is an amenable number.

121820829 is a deficient number, since it is larger than the sum of its proper divisors (53101443).

121820829 is a wasteful number, since it uses less digits than its factorization.

121820829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123627.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 121820829 is about 11037.2473470517. The cubic root of 121820829 is about 495.7246523345.

The spelling of 121820829 in words is "one hundred twenty-one million, eight hundred twenty thousand, eight hundred twenty-nine".