1220221002001 has 8 divisors (see below), whose sum is σ = 1230645436544. Its totient is φ = 1209830141520.

The previous prime is 1220221001977. The next prime is 1220221002043. The reversal of 1220221002001 is 1002001220221.

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 1220221002001 - 2²³ = 1220212613393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220221002061) 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, 8320515 + ... + 8465896.

It is an arithmetic number, because the mean of its divisors is an integer number (153830679568).

Almost surely, 2^{1220221002001} is an apocalyptic number.

It is an amenable number.

1220221002001 is a deficient number, since it is larger than the sum of its proper divisors (10424434543).

1220221002001 is a wasteful number, since it uses less digits than its factorization.

1220221002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16787031.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220221002001 its reverse (1002001220221), we get a palindrome (2222222222222).

The spelling of 1220221002001 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two thousand, one".