1113021021 has 16 divisors (see below), whose sum is σ = 1701075584. Its totient is φ = 634120704.

The previous prime is 1113021011. The next prime is 1113021023. The reversal of 1113021021 is 1201203111.

It is not a de Polignac number, because 1113021021 - 2⁵ = 1113020989 is a prime.

It is a Duffinian number.

1113021021 is a modest number, since divided by 21021 gives 1113 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1113020988 and 1113021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113021023) 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, 71560 + ... + 85713.

It is an arithmetic number, because the mean of its divisors is an integer number (106317224).

Almost surely, 2^1113021021 is an apocalyptic number.

It is an amenable number.

1113021021 is a deficient number, since it is larger than the sum of its proper divisors (588054563).

1113021021 is a wasteful number, since it uses less digits than its factorization.

1113021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157620.

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

The square root of 1113021021 is about 33361.9696810605. The cubic root of 1113021021 is about 1036.3372823519.

Adding to 1113021021 its reverse (1201203111), we get a palindrome (2314224132).

The spelling of 1113021021 in words is "one billion, one hundred thirteen million, twenty-one thousand, twenty-one".