221001221202011 has 4 divisors (see below), whose sum is σ = 221001419830224. Its totient is φ = 221001022573800.

The previous prime is 221001221201989. The next prime is 221001221202029. The reversal of 221001221202011 is 110202122100122.

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 221001221202011 - 2²² = 221001217007707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001220202011) 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, 97635695 + ... + 99873576.

It is an arithmetic number, because the mean of its divisors is an integer number (55250354957556).

Almost surely, 2^{221001221202011} is an apocalyptic number.

221001221202011 is a deficient number, since it is larger than the sum of its proper divisors (198628213).

221001221202011 is a wasteful number, since it uses less digits than its factorization.

221001221202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198628212.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221001221202011 its reverse (110202122100122), we get a palindrome (331203343302133).

The spelling of 221001221202011 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred two thousand, eleven".