2221012001 has 4 divisors (see below), whose sum is σ = 2391859092. Its totient is φ = 2050164912.

The previous prime is 2221011983. The next prime is 2221012033. The reversal of 2221012001 is 1002101222.

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 200958976 + 2020053025 = 14176^2 + 44945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221012091) 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, 85423526 + ... + 85423551.

It is an arithmetic number, because the mean of its divisors is an integer number (597964773).

Almost surely, 2^2221012001 is an apocalyptic number.

It is an amenable number.

2221012001 is a deficient number, since it is larger than the sum of its proper divisors (170847091).

2221012001 is a wasteful number, since it uses less digits than its factorization.

2221012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170847090.

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

The square root of 2221012001 is about 47127.6139964671. The cubic root of 2221012001 is about 1304.7189445776.

Adding to 2221012001 its reverse (1002101222), we get a palindrome (3223113223).

The spelling of 2221012001 in words is "two billion, two hundred twenty-one million, twelve thousand, one".