1098000121 has 2 divisors, whose sum is σ = 1098000122. Its totient is φ = 1098000120.

The previous prime is 1098000109. The next prime is 1098000143. The reversal of 1098000121 is 1210008901.

1098000121 = T₂₇₀₅₄ + T₂₇₀₅₅ + T₂₇₀₅₆.

It is an a-pointer prime, because the next prime (1098000143) can be obtained adding 1098000121 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097994496 + 5625 = 33136^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098000121 - 2¹³ = 1097991929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1098000092 and 1098000101.

It is not a weakly prime, because it can be changed into another prime (1098000721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549000060 + 549000061.

It is an arithmetic number, because the mean of its divisors is an integer number (549000061).

Almost surely, 2^1098000121 is an apocalyptic number.

1098000121 is the 27056-th centered triangular number.

It is an amenable number.

1098000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098000121 is an equidigital number, since it uses as much as digits as its factorization.

1098000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1098000121 is about 33136.0848773659. The cubic root of 1098000121 is about 1031.6541494905.

The spelling of 1098000121 in words is "one billion, ninety-eight million, one hundred twenty-one", and thus it is an aban number.