2221220020001 has 4 divisors (see below), whose sum is σ = 2221224083604. Its totient is φ = 2221215956400.

The previous prime is 2221220019973. The next prime is 2221220020007. The reversal of 2221220020001 is 1000200221222.

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 1982759691025 + 238460328976 = 1408105^2 + 488324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221220020001 - 2¹⁰ = 2221220018977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221220020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055510 + ... + 2357231.

It is an arithmetic number, because the mean of its divisors is an integer number (555306020901).

Almost surely, 2^{2221220020001} is an apocalyptic number.

It is an amenable number.

2221220020001 is a deficient number, since it is larger than the sum of its proper divisors (4063603).

2221220020001 is an equidigital number, since it uses as much as digits as its factorization.

2221220020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063602.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2221220020001 its reverse (1000200221222), we get a palindrome (3221420241223).

The spelling of 2221220020001 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, twenty thousand, one".