2221221002001 has 4 divisors (see below), whose sum is σ = 2961628002672. Its totient is φ = 1480814001332.

The previous prime is 2221221001999. The next prime is 2221221002003. The reversal of 2221221002001 is 1002001221222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2221221001999) and next prime (2221221002003).

It is a cyclic number.

It is not a de Polignac number, because 2221221002001 - 2¹ = 2221221001999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221221002003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370203500331 + ... + 370203500336.

It is an arithmetic number, because the mean of its divisors is an integer number (740407000668).

Almost surely, 2^{2221221002001} is an apocalyptic number.

It is an amenable number.

2221221002001 is a deficient number, since it is larger than the sum of its proper divisors (740407000671).

2221221002001 is an equidigital number, since it uses as much as digits as its factorization.

2221221002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740407000670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2221221002001 its reverse (1002001221222), we get a palindrome (3223222223223).

The spelling of 2221221002001 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, two thousand, one".