21023202011 has 12 divisors (see below), whose sum is σ = 24474607560. Its totient is φ = 18005853600.

The previous prime is 21023202001. The next prime is 21023202019. The reversal of 21023202011 is 11020232012.

It is a happy number.

It is not a de Polignac number, because 21023202011 - 2²² = 21019007707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023202019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103265 + ... + 229586.

It is an arithmetic number, because the mean of its divisors is an integer number (2039550630).

Almost surely, 2^21023202011 is an apocalyptic number.

21023202011 is a deficient number, since it is larger than the sum of its proper divisors (3451405549).

21023202011 is a wasteful number, since it uses less digits than its factorization.

21023202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334154 (or 334147 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21023202011 its reverse (11020232012), we get a palindrome (32043434023).

The spelling of 21023202011 in words is "twenty-one billion, twenty-three million, two hundred two thousand, eleven".