20021222011 has 8 divisors (see below), whose sum is σ = 23013660384. Its totient is φ = 17061849600.

The previous prime is 20021221991. The next prime is 20021222017. The reversal of 20021222011 is 11022212002.

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 a de Polignac number, because none of the positive numbers 2^k-20021222011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021221982 and 20021222000.

It is not an unprimeable number, because it can be changed into a prime (20021222017) 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, 8265190 + ... + 8267611.

It is an arithmetic number, because the mean of its divisors is an integer number (2876707548).

Almost surely, 2^20021222011 is an apocalyptic number.

20021222011 is a deficient number, since it is larger than the sum of its proper divisors (2992438373).

20021222011 is a wasteful number, since it uses less digits than its factorization.

20021222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16532981.

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

Adding to 20021222011 its reverse (11022212002), we get a palindrome (31043434013).

The spelling of 20021222011 in words is "twenty billion, twenty-one million, two hundred twenty-two thousand, eleven".