121721034 has 16 divisors (see below), whose sum is σ = 243617472. Its totient is φ = 40544448.

The previous prime is 121721021. The next prime is 121721069. The reversal of 121721034 is 430127121.

It is a self number, because there is not a number n which added to its sum of digits gives 121721034.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2787 + ... + 15849.

It is an arithmetic number, because the mean of its divisors is an integer number (15226092).

Almost surely, 2^121721034 is an apocalyptic number.

121721034 is an abundant number, since it is smaller than the sum of its proper divisors (121896438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121721034 is a wasteful number, since it uses less digits than its factorization.

121721034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14621.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 121721034 is about 11032.7255925270. The cubic root of 121721034 is about 495.5892503210.

Adding to 121721034 its reverse (430127121), we get a palindrome (551848155).

The spelling of 121721034 in words is "one hundred twenty-one million, seven hundred twenty-one thousand, thirty-four".