1101131021 has 16 divisors (see below), whose sum is σ = 1197379584. Its totient is φ = 1008693504.

The previous prime is 1101130991. The next prime is 1101131023. The reversal of 1101131021 is 1201311011.

It is a happy number.

It is not a de Polignac number, because 1101131021 - 2¹⁸ = 1100868877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101130993 and 1101131011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101131023) 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, 109616 + ... + 119238.

It is an arithmetic number, because the mean of its divisors is an integer number (74836224).

Almost surely, 2^1101131021 is an apocalyptic number.

It is an amenable number.

1101131021 is a deficient number, since it is larger than the sum of its proper divisors (96248563).

1101131021 is a wasteful number, since it uses less digits than its factorization.

1101131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9820.

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

The square root of 1101131021 is about 33183.2943060209. The cubic root of 1101131021 is about 1032.6337913851.

Adding to 1101131021 its reverse (1201311011), we get a palindrome (2302442032).

The spelling of 1101131021 in words is "one billion, one hundred one million, one hundred thirty-one thousand, twenty-one".