1020121299 has 24 divisors (see below), whose sum is σ = 1493743680. Its totient is φ = 670799232.

The previous prime is 1020121273. The next prime is 1020121301. The reversal of 1020121299 is 9921210201.

It is not a de Polignac number, because 1020121299 - 2¹¹ = 1020119251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020121099) 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 in 23 ways as a sum of consecutive naturals, for example, 226342 + ... + 230804.

It is an arithmetic number, because the mean of its divisors is an integer number (62239320).

Almost surely, 2^1020121299 is an apocalyptic number.

1020121299 is a deficient number, since it is larger than the sum of its proper divisors (473622381).

1020121299 is a wasteful number, since it uses less digits than its factorization.

1020121299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811 (or 4808 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1020121299 is about 31939.3377983953. The cubic root of 1020121299 is about 1006.6626107000.

The spelling of 1020121299 in words is "one billion, twenty million, one hundred twenty-one thousand, two hundred ninety-nine".