221001120112011 has 4 divisors (see below), whose sum is σ = 294668160149352. Its totient is φ = 147334080074672.

The previous prime is 221001120112009. The next prime is 221001120112043. The reversal of 221001120112011 is 110211021100122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221001120112011 - 2¹ = 221001120112009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001120112511) 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, 36833520018666 + ... + 36833520018671.

It is an arithmetic number, because the mean of its divisors is an integer number (73667040037338).

Almost surely, 2^{221001120112011} is an apocalyptic number.

221001120112011 is a deficient number, since it is larger than the sum of its proper divisors (73667040037341).

221001120112011 is an equidigital number, since it uses as much as digits as its factorization.

221001120112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73667040037340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221001120112011 its reverse (110211021100122), we get a palindrome (331212141212133).

The spelling of 221001120112011 in words is "two hundred twenty-one trillion, one billion, one hundred twenty million, one hundred twelve thousand, eleven".