220121519 has 2 divisors, whose sum is σ = 220121520. Its totient is φ = 220121518.

The previous prime is 220121509. The next prime is 220121549. The reversal of 220121519 is 915121022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220121519 - 2²⁴ = 203344303 is a prime.

It is a super-2 number, since 2×220121519² = 96906966253734722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220121494 and 220121503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060759 + 110060760.

It is an arithmetic number, because the mean of its divisors is an integer number (110060760).

Almost surely, 2^220121519 is an apocalyptic number.

220121519 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121519 is an equidigital number, since it uses as much as digits as its factorization.

220121519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 220121519 is about 14836.4928133302. The cubic root of 220121519 is about 603.7922027976.

The spelling of 220121519 in words is "two hundred twenty million, one hundred twenty-one thousand, five hundred nineteen".