1011330021 has 16 divisors (see below), whose sum is σ = 1502242560. Its totient is φ = 600895680.

The previous prime is 1011329993. The next prime is 1011330053. The reversal of 1011330021 is 1200331101.

It is not a de Polignac number, because 1011330021 - 2⁹ = 1011329509 is a prime.

It is a super-2 number, since 2×1011330021² = 2045576822751720882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011329979 and 1011330006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011330121) 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, 445965 + ... + 448226.

It is an arithmetic number, because the mean of its divisors is an integer number (93890160).

Almost surely, 2^1011330021 is an apocalyptic number.

It is an amenable number.

1011330021 is a deficient number, since it is larger than the sum of its proper divisors (490912539).

1011330021 is a wasteful number, since it uses less digits than its factorization.

1011330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894236.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1011330021 is about 31801.4153930293. The cubic root of 1011330021 is about 1003.7624995096.

Adding to 1011330021 its reverse (1200331101), we get a palindrome (2211661122).

The spelling of 1011330021 in words is "one billion, eleven million, three hundred thirty thousand, twenty-one".