21233001011 has 16 divisors (see below), whose sum is σ = 23363408640. Its totient is φ = 19206966240.

The previous prime is 21233001001. The next prime is 21233001029. The reversal of 21233001011 is 11010033212.

It is not a de Polignac number, because 21233001011 - 2¹⁴ = 21232984627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233001001) 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, 206981 + ... + 292073.

It is an arithmetic number, because the mean of its divisors is an integer number (1460213040).

Almost surely, 2^21233001011 is an apocalyptic number.

21233001011 is a deficient number, since it is larger than the sum of its proper divisors (2130407629).

21233001011 is a wasteful number, since it uses less digits than its factorization.

21233001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85706.

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

Adding to 21233001011 its reverse (11010033212), we get a palindrome (32243034223).

The spelling of 21233001011 in words is "twenty-one billion, two hundred thirty-three million, one thousand, eleven".