1031223213011 has 4 divisors (see below), whose sum is σ = 1031231736024. Its totient is φ = 1031214690000.

The previous prime is 1031223212927. The next prime is 1031223213019. The reversal of 1031223213011 is 1103123221301.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031223213011 is a prime.

It is a super-2 number, since 2×1031223213011² (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 (1031223213019) 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, 4077365 + ... + 4322886.

It is an arithmetic number, because the mean of its divisors is an integer number (257807934006).

Almost surely, 2^{1031223213011} is an apocalyptic number.

1031223213011 is a deficient number, since it is larger than the sum of its proper divisors (8523013).

1031223213011 is an equidigital number, since it uses as much as digits as its factorization.

1031223213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523012.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031223213011 its reverse (1103123221301), we get a palindrome (2134346434312).

It can be divided in two parts, 103122 and 3213011, that added together give a palindrome (3316133).

The spelling of 1031223213011 in words is "one trillion, thirty-one billion, two hundred twenty-three million, two hundred thirteen thousand, eleven".