1201023111 has 16 divisors (see below), whose sum is σ = 1655682048. Its totient is φ = 773606400.

The previous prime is 1201023091. The next prime is 1201023113. The reversal of 1201023111 is 1113201021.

It is not a de Polignac number, because 1201023111 - 2¹⁷ = 1200892039 is a prime.

It is a super-2 number, since 2×1201023111² = 2884913026312236642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201023113) 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, 49540 + ... + 69686.

It is an arithmetic number, because the mean of its divisors is an integer number (103480128).

Almost surely, 2^1201023111 is an apocalyptic number.

1201023111 is a deficient number, since it is larger than the sum of its proper divisors (454658937).

1201023111 is a wasteful number, since it uses less digits than its factorization.

1201023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20822.

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

The square root of 1201023111 is about 34655.7803403703. The cubic root of 1201023111 is about 1062.9604883029.

Adding to 1201023111 its reverse (1113201021), we get a palindrome (2314224132).

The spelling of 1201023111 in words is "one billion, two hundred one million, twenty-three thousand, one hundred eleven".