1021230011 has 4 divisors (see below), whose sum is σ = 1023118224. Its totient is φ = 1019341800.

The previous prime is 1021229999. The next prime is 1021230017. The reversal of 1021230011 is 1100321201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021230011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021229974 and 1021230001.

It is not an unprimeable number, because it can be changed into a prime (1021230017) 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, 943295 + ... + 944376.

It is an arithmetic number, because the mean of its divisors is an integer number (255779556).

Almost surely, 2^1021230011 is an apocalyptic number.

1021230011 is a deficient number, since it is larger than the sum of its proper divisors (1888213).

1021230011 is an equidigital number, since it uses as much as digits as its factorization.

1021230011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888212.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1021230011 is about 31956.6896126617. The cubic root of 1021230011 is about 1007.0271734960.

Adding to 1021230011 its reverse (1100321201), we get a palindrome (2121551212).

The spelling of 1021230011 in words is "one billion, twenty-one million, two hundred thirty thousand, eleven".