103021090 has 16 divisors (see below), whose sum is σ = 185636088. Its totient is φ = 41164416.

The previous prime is 103021073. The next prime is 103021099. The reversal of 103021090 is 90120301.

It can be written as a sum of positive squares in 4 ways, for example, as 88906041 + 14115049 = 9429^2 + 3757^2 .

It is a super-2 number, since 2×103021090² = 21226689969576200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (103021099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5344 + ... + 15316.

Almost surely, 2^103021090 is an apocalyptic number.

103021090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

103021090 is a deficient number, since it is larger than the sum of its proper divisors (82614998).

103021090 is a wasteful number, since it uses less digits than its factorization.

103021090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11013.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 103021090 is about 10149.9305416343. The cubic root of 103021090 is about 468.7868062358.

Adding to 103021090 its reverse (90120301), we get a palindrome (193141391).

The spelling of 103021090 in words is "one hundred three million, twenty-one thousand, ninety".