201222221001 has 4 divisors (see below), whose sum is σ = 268296294672. Its totient is φ = 134148147332.

The previous prime is 201222220973. The next prime is 201222221003. The reversal of 201222221001 is 100122222102.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201222221001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201222221003) 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, 33537036831 + ... + 33537036836.

It is an arithmetic number, because the mean of its divisors is an integer number (67074073668).

Almost surely, 2^201222221001 is an apocalyptic number.

It is an amenable number.

201222221001 is a deficient number, since it is larger than the sum of its proper divisors (67074073671).

201222221001 is an equidigital number, since it uses as much as digits as its factorization.

201222221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67074073670.

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

Adding to 201222221001 its reverse (100122222102), we get a palindrome (301344443103).

The spelling of 201222221001 in words is "two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one".