21022001011 has 8 divisors (see below), whose sum is σ = 22936462704. Its totient is φ = 19108101120.

The previous prime is 21022000903. The next prime is 21022001029. The reversal of 21022001011 is 11010022012.

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 21022001011 - 2²⁷ = 20887783283 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, 60210 + ... + 213703.

It is an arithmetic number, because the mean of its divisors is an integer number (2867057838).

Almost surely, 2^21022001011 is an apocalyptic number.

21022001011 is a deficient number, since it is larger than the sum of its proper divisors (1914461693).

21022001011 is a wasteful number, since it uses less digits than its factorization.

21022001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280901.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21022001011 its reverse (11010022012), we get a palindrome (32032023023).

The spelling of 21022001011 in words is "twenty-one billion, twenty-two million, one thousand, eleven".