7221121122001 has 8 divisors (see below), whose sum is σ = 7237892870208. Its totient is φ = 7204354170000.

The previous prime is 7221121121989. The next prime is 7221121122013. The reversal of 7221121122001 is 1002211211227.

It is an interprime number because it is at equal distance from previous prime (7221121121989) and next prime (7221121122013).

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 7221121122001 - 2⁵ = 7221121121969 is a prime.

It is a super-2 number, since 2×7221121122001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221121122031) 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, 1824466 + ... + 4215556.

It is an arithmetic number, because the mean of its divisors is an integer number (904736608776).

Almost surely, 2^{7221121122001} is an apocalyptic number.

It is an amenable number.

7221121122001 is a deficient number, since it is larger than the sum of its proper divisors (16771748207).

7221121122001 is a wasteful number, since it uses less digits than its factorization.

7221121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398103.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 7221121122001 its reverse (1002211211227), we get a palindrome (8223332333228).

The spelling of 7221121122001 in words is "seven trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one".