1011123011 has 4 divisors (see below), whose sum is σ = 1013335992. Its totient is φ = 1008910032.

The previous prime is 1011122993. The next prime is 1011123023. The reversal of 1011123011 is 1103211101.

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 1011123011 - 2¹⁰ = 1011121987 is a prime.

It is a super-2 number, since 2×1011123011² = 2044739486747412242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011122983 and 1011123001.

It is not an unprimeable number, because it can be changed into a prime (1011123041) 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, 1105805 + ... + 1106718.

It is an arithmetic number, because the mean of its divisors is an integer number (253333998).

Almost surely, 2^1011123011 is an apocalyptic number.

1011123011 is a deficient number, since it is larger than the sum of its proper divisors (2212981).

1011123011 is an equidigital number, since it uses as much as digits as its factorization.

1011123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212980.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1011123011 is about 31798.1604971105. The cubic root of 1011123011 is about 1003.6940078370.

Adding to 1011123011 its reverse (1103211101), we get a palindrome (2114334112).

The spelling of 1011123011 in words is "one billion, eleven million, one hundred twenty-three thousand, eleven".