22001221202011 has 16 divisors (see below), whose sum is σ = 22215448071936. Its totient is φ = 21787994709216.

The previous prime is 22001221201937. The next prime is 22001221202021. The reversal of 22001221202011 is 11020212210022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22001221202011 - 2²¹ = 22001219104859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001221202021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493422460 + ... + 493467046.

It is an arithmetic number, because the mean of its divisors is an integer number (1388465504496).

Almost surely, 2^{22001221202011} is an apocalyptic number.

22001221202011 is a deficient number, since it is larger than the sum of its proper divisors (214226869925).

22001221202011 is a wasteful number, since it uses less digits than its factorization.

22001221202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55698.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22001221202011 its reverse (11020212210022), we get a palindrome (33021433412033).

The spelling of 22001221202011 in words is "twenty-two trillion, one billion, two hundred twenty-one million, two hundred two thousand, eleven".