10220016721 has 8 divisors (see below), whose sum is σ = 10381160160. Its totient is φ = 10059126528.

The previous prime is 10220016691. The next prime is 10220016727. The reversal of 10220016721 is 12761002201.

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 10220016721 - 2¹³ = 10220008529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220016692 and 10220016701.

It is not an unprimeable number, because it can be changed into a prime (10220016727) 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, 18870 + ... + 144208.

It is an arithmetic number, because the mean of its divisors is an integer number (1297645020).

Almost surely, 2^10220016721 is an apocalyptic number.

It is an amenable number.

10220016721 is a deficient number, since it is larger than the sum of its proper divisors (161143439).

10220016721 is a wasteful number, since it uses less digits than its factorization.

10220016721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126623.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 10220016721 its reverse (12761002201), we get a palindrome (22981018922).

The spelling of 10220016721 in words is "ten billion, two hundred twenty million, sixteen thousand, seven hundred twenty-one".