2221001020001 has 4 divisors (see below), whose sum is σ = 2297587262100. Its totient is φ = 2144414777904.

The previous prime is 2221001019953. The next prime is 2221001020031. The reversal of 2221001020001 is 1000201001222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 924645712225 + 1296355307776 = 961585^2 + 1138576^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221001020001 - 2²⁶ = 2220933911137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221001020031) 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, 38293121006 + ... + 38293121063.

It is an arithmetic number, because the mean of its divisors is an integer number (574396815525).

Almost surely, 2^{2221001020001} is an apocalyptic number.

It is an amenable number.

2221001020001 is a deficient number, since it is larger than the sum of its proper divisors (76586242099).

2221001020001 is an equidigital number, since it uses as much as digits as its factorization.

2221001020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76586242098.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2221001020001 its reverse (1000201001222), we get a palindrome (3221202021223).

The spelling of 2221001020001 in words is "two trillion, two hundred twenty-one billion, one million, twenty thousand, one".