1012020211331 has 4 divisors (see below), whose sum is σ = 1065284433000. Its totient is φ = 958755989664.

The previous prime is 1012020211313. The next prime is 1012020211351. The reversal of 1012020211331 is 1331120202101.

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 1012020211331 - 2³⁸ = 737142304387 is a prime.

It is a super-2 number, since 2×1012020211331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012020211351) 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, 26632110806 + ... + 26632110843.

It is an arithmetic number, because the mean of its divisors is an integer number (266321108250).

Almost surely, 2^{1012020211331} is an apocalyptic number.

1012020211331 is a deficient number, since it is larger than the sum of its proper divisors (53264221669).

1012020211331 is an equidigital number, since it uses as much as digits as its factorization.

1012020211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53264221668.

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

Adding to 1012020211331 its reverse (1331120202101), we get a palindrome (2343140413432).

The spelling of 1012020211331 in words is "one trillion, twelve billion, twenty million, two hundred eleven thousand, three hundred thirty-one".