21301023011 has 2 divisors, whose sum is σ = 21301023012. Its totient is φ = 21301023010.

The previous prime is 21301022983. The next prime is 21301023019. The reversal of 21301023011 is 11032010312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21301023011 - 2⁶ = 21301022947 is a prime.

It is a super-2 number, since 2×21301023011² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21301023019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650511505 + 10650511506.

It is an arithmetic number, because the mean of its divisors is an integer number (10650511506).

Almost surely, 2^21301023011 is an apocalyptic number.

21301023011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301023011 is an equidigital number, since it uses as much as digits as its factorization.

21301023011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21301023011 its reverse (11032010312), we get a palindrome (32333033323).

The spelling of 21301023011 in words is "twenty-one billion, three hundred one million, twenty-three thousand, eleven".