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122121321 = 3741913879
BaseRepresentation
bin1110100011101…
…10110001101001
322111210101221220
413101312301221
5222230340241
620041252253
73012004560
oct721666151
9274711856
10122121321
1162a30613
1234a94089
131c3ba64a
141230cbd7
15aac4166
hex7476c69

122121321 has 16 divisors (see below), whose sum is σ = 186547200. Its totient is φ = 69612048.

The previous prime is 122121301. The next prime is 122121323. The reversal of 122121321 is 123121221.

It is not a de Polignac number, because 122121321 - 26 = 122121257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122121321.

It is not an unprimeable number, because it can be changed into a prime (122121323) 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, 1860 + ... + 15738.

It is an arithmetic number, because the mean of its divisors is an integer number (11659200).

Almost surely, 2122121321 is an apocalyptic number.

It is an amenable number.

122121321 is a deficient number, since it is larger than the sum of its proper divisors (64425879).

122121321 is a wasteful number, since it uses less digits than its factorization.

122121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14308.

The product of its digits is 48, while the sum is 15.

The square root of 122121321 is about 11050.8515961441. The cubic root of 122121321 is about 496.1319143259.

Adding to 122121321 its reverse (123121221), we get a palindrome (245242542).

The spelling of 122121321 in words is "one hundred twenty-two million, one hundred twenty-one thousand, three hundred twenty-one".

Divisors: 1 3 7 21 419 1257 2933 8799 13879 41637 97153 291459 5815301 17445903 40707107 122121321