21020222011 has 8 divisors (see below), whose sum is σ = 21252039984. Its totient is φ = 20789059200.

The previous prime is 21020221997. The next prime is 21020222029. The reversal of 21020222011 is 11022202012.

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 21020222011 - 2¹¹ = 21020219963 is a prime.

It is a super-3 number, since 3×21020222011³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020221982 and 21020222000.

It is not an unprimeable number, because it can be changed into a prime (21020222081) 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, 99130 + ... + 227743.

It is an arithmetic number, because the mean of its divisors is an integer number (2656504998).

Almost surely, 2^21020222011 is an apocalyptic number.

21020222011 is a deficient number, since it is larger than the sum of its proper divisors (231817973).

21020222011 is a wasteful number, since it uses less digits than its factorization.

21020222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327581.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21020222011 its reverse (11022202012), we get a palindrome (32042424023).

The spelling of 21020222011 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, eleven".