21010011211 has 16 divisors (see below), whose sum is σ = 24811648000. Its totient is φ = 17780601384.

The previous prime is 21010011203. The next prime is 21010011223. The reversal of 21010011211 is 11211001012.

It is not a de Polignac number, because 21010011211 - 2³ = 21010011203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010011241) 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, 360585 + ... + 414778.

It is an arithmetic number, because the mean of its divisors is an integer number (1550728000).

Almost surely, 2^21010011211 is an apocalyptic number.

21010011211 is a deficient number, since it is larger than the sum of its proper divisors (3801636789).

21010011211 is an frugal number, since it uses more digits than its factorization.

21010011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775463 (or 775449 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010011211 its reverse (11211001012), we get a palindrome (32221012223).

The spelling of 21010011211 in words is "twenty-one billion, ten million, eleven thousand, two hundred eleven".