1011311210023 has 4 divisors (see below), whose sum is σ = 1015542637920. Its totient is φ = 1007079782128.

The previous prime is 1011311209981. The next prime is 1011311210071. The reversal of 1011311210023 is 3200121131101.

It is a happy number.

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 1011311210023 - 2⁹ = 1011311209511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011311209979 and 1011311210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011311810023) 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, 2115713590 + ... + 2115714067.

It is an arithmetic number, because the mean of its divisors is an integer number (253885659480).

Almost surely, 2^{1011311210023} is an apocalyptic number.

1011311210023 is a deficient number, since it is larger than the sum of its proper divisors (4231427897).

1011311210023 is an equidigital number, since it uses as much as digits as its factorization.

1011311210023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231427896.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1011311210023 its reverse (3200121131101), we get a palindrome (4211432341124).

The spelling of 1011311210023 in words is "one trillion, eleven billion, three hundred eleven million, two hundred ten thousand, twenty-three".