1002020311 has 4 divisors (see below), whose sum is σ = 1002352000. Its totient is φ = 1001688624.

The previous prime is 1002020297. The next prime is 1002020317. The reversal of 1002020311 is 1130202001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002020311 - 2²³ = 993631703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002020317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161271 + ... + 167368.

It is an arithmetic number, because the mean of its divisors is an integer number (250588000).

Almost surely, 2^1002020311 is an apocalyptic number.

1002020311 is a deficient number, since it is larger than the sum of its proper divisors (331689).

1002020311 is an equidigital number, since it uses as much as digits as its factorization.

1002020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331688.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1002020311 is about 31654.7044055066. The cubic root of 1002020311 is about 1000.6729839909.

Adding to 1002020311 its reverse (1130202001), we get a palindrome (2132222312).

The spelling of 1002020311 in words is "one billion, two million, twenty thousand, three hundred eleven".