20121098 has 16 divisors (see below), whose sum is σ = 32291784. Its totient is φ = 9369600.

The previous prime is 20121097. The next prime is 20121103. The reversal of 20121098 is 89012102.

It can be written as a sum of positive squares in 4 ways, for example, as 19298449 + 822649 = 4393^2 + 907^2 .

It is not an unprimeable number, because it can be changed into a prime (20121091) 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, 248 + ... + 6348.

Almost surely, 2^20121098 is an apocalyptic number.

20121098 is a deficient number, since it is larger than the sum of its proper divisors (12170686).

20121098 is a wasteful number, since it uses less digits than its factorization.

20121098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 20121098 is about 4485.6546902320. The cubic root of 20121098 is about 271.9885105441.

The spelling of 20121098 in words is "twenty million, one hundred twenty-one thousand, ninety-eight".