21022001211 has 8 divisors (see below), whose sum is σ = 28041795904. Its totient is φ = 14008437000.

The previous prime is 21022001191. The next prime is 21022001227. The reversal of 21022001211 is 11210022012.

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

It is not a de Polignac number, because 21022001211 - 2⁵ = 21022001179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022001411) 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, 1549741 + ... + 1563246.

It is an arithmetic number, because the mean of its divisors is an integer number (3505224488).

Almost surely, 2^21022001211 is an apocalyptic number.

21022001211 is a deficient number, since it is larger than the sum of its proper divisors (7019794693).

21022001211 is a wasteful number, since it uses less digits than its factorization.

21022001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115241.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21022001211 its reverse (11210022012), we get a palindrome (32232023223).

The spelling of 21022001211 in words is "twenty-one billion, twenty-two million, one thousand, two hundred eleven".