9221020001 has 2 divisors, whose sum is σ = 9221020002. Its totient is φ = 9221020000.

The previous prime is 9221019961. The next prime is 9221020013. The reversal of 9221020001 is 1000201229.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7577528401 + 1643491600 = 87049^2 + 40540^2 .

It is an emirp because it is prime and its reverse (1000201229) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9221020001 - 2²² = 9216825697 is a prime.

It is not a weakly prime, because it can be changed into another prime (9221020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4610510000 + 4610510001.

It is an arithmetic number, because the mean of its divisors is an integer number (4610510001).

Almost surely, 2^9221020001 is an apocalyptic number.

It is an amenable number.

9221020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9221020001 is an equidigital number, since it uses as much as digits as its factorization.

9221020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 9221020001 is about 96026.1422790690. The cubic root of 9221020001 is about 2096.9737211659.

It can be divided in two parts, 92210 and 20001, that added together give a palindrome (112211).

The spelling of 9221020001 in words is "nine billion, two hundred twenty-one million, twenty thousand, one".