21023002211 has 8 divisors (see below), whose sum is σ = 21067238640. Its totient is φ = 20978809632.

The previous prime is 21023002153. The next prime is 21023002243. The reversal of 21023002211 is 11220032012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21023002211 - 2³⁴ = 3843133027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023002291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055180 + ... + 1074918.

It is an arithmetic number, because the mean of its divisors is an integer number (2633404830).

Almost surely, 2^21023002211 is an apocalyptic number.

21023002211 is a deficient number, since it is larger than the sum of its proper divisors (44236429).

21023002211 is a wasteful number, since it uses less digits than its factorization.

21023002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21925.

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

Adding to 21023002211 its reverse (11220032012), we get a palindrome (32243034223).

The spelling of 21023002211 in words is "twenty-one billion, twenty-three million, two thousand, two hundred eleven".