1011211111023 has 16 divisors (see below), whose sum is σ = 1349436102240. Its totient is φ = 673563585024.

The previous prime is 1011211111019. The next prime is 1011211111067. The reversal of 1011211111023 is 3201111121101.

It is not a de Polignac number, because 1011211111023 - 2² = 1011211111019 is a prime.

It is a super-2 number, since 2×1011211111023² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011211110993 and 1011211111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211111093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34605243 + ... + 34634451.

It is an arithmetic number, because the mean of its divisors is an integer number (84339756390).

Almost surely, 2^{1011211111023} is an apocalyptic number.

1011211111023 is a deficient number, since it is larger than the sum of its proper divisors (338224991217).

1011211111023 is a wasteful number, since it uses less digits than its factorization.

1011211111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38698.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 1011211111023 its reverse (3201111121101), we get a palindrome (4212322232124).

The spelling of 1011211111023 in words is "one trillion, eleven billion, two hundred eleven million, one hundred eleven thousand, twenty-three".