10220021021 has 8 divisors (see below), whose sum is σ = 11686816704. Its totient is φ = 8754923520.

The previous prime is 10220021011. The next prime is 10220021057. The reversal of 10220021021 is 12012002201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-10220021021 is a prime.

It is a Duffinian number.

10220021021 is a modest number, since divided by 21021 gives 10220 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 10220020993 and 10220021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220021011) 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, 411620 + ... + 435741.

It is an arithmetic number, because the mean of its divisors is an integer number (1460852088).

Almost surely, 2^10220021021 is an apocalyptic number.

It is an amenable number.

10220021021 is a deficient number, since it is larger than the sum of its proper divisors (1466795683).

10220021021 is an equidigital number, since it uses as much as digits as its factorization.

10220021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849091.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10220021021 its reverse (12012002201), we get a palindrome (22232023222).

The spelling of 10220021021 in words is "ten billion, two hundred twenty million, twenty-one thousand, twenty-one".