1020321031211 has 4 divisors (see below), whose sum is σ = 1020398511624. Its totient is φ = 1020243550800.

The previous prime is 1020321031207. The next prime is 1020321031229. The reversal of 1020321031211 is 1121301230201.

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 1020321031211 - 2² = 1020321031207 is a prime.

It is a super-2 number, since 2×1020321031211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020321031211.

It is not an unprimeable number, because it can be changed into a prime (1020321031711) 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, 38720450 + ... + 38746791.

It is an arithmetic number, because the mean of its divisors is an integer number (255099627906).

Almost surely, 2^{1020321031211} is an apocalyptic number.

1020321031211 is a deficient number, since it is larger than the sum of its proper divisors (77480413).

1020321031211 is an equidigital number, since it uses as much as digits as its factorization.

1020321031211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77480412.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1020321031211 its reverse (1121301230201), we get a palindrome (2141622261412).

The spelling of 1020321031211 in words is "one trillion, twenty billion, three hundred twenty-one million, thirty-one thousand, two hundred eleven".