220001022021 has 96 divisors (see below), whose sum is σ = 353311257600. Its totient is φ = 120417960960.

The previous prime is 220001022011. The next prime is 220001022071. The reversal of 220001022021 is 120220100022.

It is not a de Polignac number, because 220001022021 - 2⁷ = 220001021893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220001021988 and 220001022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001022001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117083160 + ... + 117085038.

It is an arithmetic number, because the mean of its divisors is an integer number (3680325600).

Almost surely, 2^220001022021 is an apocalyptic number.

It is an amenable number.

220001022021 is a deficient number, since it is larger than the sum of its proper divisors (133310235579).

220001022021 is a wasteful number, since it uses less digits than its factorization.

220001022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2288 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 220001022021 its reverse (120220100022), we get a palindrome (340221122043).

The spelling of 220001022021 in words is "two hundred twenty billion, one million, twenty-two thousand, twenty-one".