10220001021 has 6 divisors (see below), whose sum is σ = 14762223710. Its totient is φ = 6813334008.

The previous prime is 10220001019. The next prime is 10220001047. The reversal of 10220001021 is 12010002201.

10220001021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6148284921 + 4071716100 = 78411^2 + 63810^2 .

It is not a de Polignac number, because 10220001021 - 2¹ = 10220001019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1135555669 = 10220001021 / (1 + 0 + 2 + 2 + 0 + 0 + 0 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220000994 and 10220001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220001091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567777826 + ... + 567777843.

Almost surely, 2^10220001021 is an apocalyptic number.

It is an amenable number.

10220001021 is a deficient number, since it is larger than the sum of its proper divisors (4542222689).

10220001021 is a wasteful number, since it uses less digits than its factorization.

10220001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135555675 (or 1135555672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10220001021 its reverse (12010002201), we get a palindrome (22230003222).

The spelling of 10220001021 in words is "ten billion, two hundred twenty million, one thousand, twenty-one".