1002120311 has 4 divisors (see below), whose sum is σ = 1002198624. Its totient is φ = 1002042000.

The previous prime is 1002120307. The next prime is 1002120313. The reversal of 1002120311 is 1130212001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1002120311 - 2² = 1002120307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002120292 and 1002120301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002120313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14990 + ... + 47211.

It is an arithmetic number, because the mean of its divisors is an integer number (250549656).

Almost surely, 2^1002120311 is an apocalyptic number.

1002120311 is a deficient number, since it is larger than the sum of its proper divisors (78313).

1002120311 is an equidigital number, since it uses as much as digits as its factorization.

1002120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78312.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1002120311 is about 31656.2839101497. The cubic root of 1002120311 is about 1000.7062713966.

Adding to 1002120311 its reverse (1130212001), we get a palindrome (2132332312).

The spelling of 1002120311 in words is "one billion, two million, one hundred twenty thousand, three hundred eleven".